Leopard Gecko Feeding Calculator – How Many Insects and How Often?
Enter your gecko’s age, weight and favorite feeder insect to get a personal feeding plan: feeding days per week, insects per feeding, calcium and multivitamin days and a full weekly schedule.
- Quick answer
- Description
- How to use
- Example
- Feeding chart
- Feeding by life stage
- Best feeder insects
- Insect size and gut-loading
- Calcium, vitamins and lighting
- Water and moisture
- Feeding routine and timing
- Weight and body condition
- Appetite problems
- Gravid females and seniors
- Common mistakes
- Related tools
- FAQs
Quick Answer: How Much and How Often Should a Leopard Gecko Eat?
Leopard geckos are insectivores, and their schedule depends on age. Hatchlings and juveniles are fed every day, sub-adults every day to every other day and healthy adults every two to three days. A common starting range is 4 to 8 tiny insects for a hatchling, 5 to 10 small insects for a juvenile and 5 to 8 medium insects for an adult, never longer than the space between the eyes. Dust prey with calcium at most feedings while growing, add a multivitamin once a week and adjust by weight. The Leopard Gecko Feeding Calculator above turns these rules into exact numbers for your animal.
Description: What Is a Leopard Gecko Feeding Calculator?
A leopard gecko feeding calculator is a planning tool that turns three facts about your lizard (its age, its weight and the insect you feed most often) into a weekly menu. Instead of a vague instruction such as “feed every day when young and less when older”, it tells you how many days per week to feed, how many insects fit in one meal, which days get calcium and which day gets a multivitamin.
I have kept and advised on leopard geckos for many years, and nearly every feeding problem that reaches me falls into one of two groups. Either a growing baby was fed too sparingly and ended up small and weak, or a settled adult was fed like a juvenile and became heavy and sluggish. Both come from applying one routine to every life stage. The common leopard gecko (Eublepharis macularius) is a strict insectivore from the dry grasslands and rocky deserts of South Asia, and its needs shift dramatically between hatching and maturity. A Leopard Gecko Feeding Calculator is simply a way of respecting that shift with numbers. For background on the species, see this overview of the common leopard gecko.
The tool above follows the same habits I use at home. It starts with a stage-based schedule, converts that into insects per feeding for the feeder you choose and then checks the result against the typical weight for your gecko’s age. If your animal sits above or below that range, the plan shifts and tells you why.
What the calculator gives you
- Feeding days per week for your gecko’s life stage.
- Insects per feeding and per week, scaled for the feeder species you pick.
- The right insect size and a reminder about gut-loading.
- Calcium dusting days and a multivitamin day.
- A seven-day schedule you can screenshot and keep near the enclosure.
- A weight check against the typical curve, with plan adjustments when needed.
Who should use it
It suits first-time owners who bought a baby and feel unsure about portions, keepers who inherited a rescue, breeders feeding clutches at different ages and experienced owners who want a sanity check before a vet visit. It is a starting point, not a prescription; a reptile veterinarian always has the final word on a specific animal.
How to Use the Leopard Gecko Feeding Calculator
- Enter the age. Type a number and choose months or years. A month or two of error rarely matters, because the plan changes gradually.
- Add the weight (optional but recommended). Weigh your gecko on a kitchen scale using a small container, then choose grams or ounces. This unlocks the body-condition check.
- Choose the sex if you know it. Males are usually heavier, so the typical-weight comparison shifts a little.
- Pick the main feeder insect. Staples such as dubia roaches, crickets, black soldier fly larvae and silkworms are marked, and treat feeders such as superworms and waxworms are labeled as such.
- Press “Calculate Feeding Plan”. You will see the life stage, the feeding schedule, a set of tiles, a weekly table and a chart that marks where your gecko sits on the age curve.
- Copy the plan. The “Copy Plan” button gives a short text summary you can paste into notes or send to your vet.
Reading the result tiles
“Feeding days per week” is the backbone of the plan. “Insects per feeding” is a range for one session, and “Insects per week” multiplies that range by the feeding days. The size tile shows how big each insect should be. The calcium and multivitamin tiles show dusting frequency, and the final tile tells you when the plan will change next, so you can prepare for the move to a lighter schedule.
Expert tip: Treat the insect count as a ceiling, not a target. If your gecko loses interest after five insects, stop. Watching behavior and weight tells you what the animal needs far better than a rigid count.
Example: Three Real-World Calculations
Example 1 – A six-week-old hatchling on dubia roaches
A breeder-bought baby is six weeks old (1.5 months), weight not entered, and eats small dubia nymphs. The Leopard Gecko Feeding Calculator returns a hatchling plan: feed on all seven days a week, with 4 to 8 tiny insects per feeding, or about 28 to 56 per week. Calcium goes on insects six days a week and a multivitamin once a week. This matches what I would do for a fast-growing baby: frequent protein, consistent calcium and a quick weigh-in every week.
Example 2 – An eight-month-old on crickets, 52 g
For an eight-month-old gecko eating crickets, the plan treats the animal as a sub-adult: five feeding days a week, with 6 to 10 crickets per feeding because crickets are smaller than dubia, or about 30 to 50 per week. Typical weight at eight months is about 55 grams, so a 52-gram gecko sits at roughly 95 percent and falls inside the normal band. No adjustment is needed. This is the age where I begin spacing meals out and watching the tail closely.
Example 3 – A three-year-old female on dubia, 80 g
A three-year-old female normally weighs near 63 grams, so 80 grams is roughly 126 percent of typical and flagged as heavy. The calculator trims insect counts by about 20 percent and removes one feeding day. The result is 4 to 6 insects per feeding on two days a week, with calcium at one feeding and a multivitamin at the other. Retest the weight every two weeks. A slow downward drift of a gram or two is ideal; a sudden drop calls for a vet visit.
Leopard Gecko Feeding Chart by Age
The chart inside the calculator draws two stepped lines: feeding days per week, which fall from seven in the first months to three in adulthood, and insects per week, which peak in the juvenile stage and then taper off. The table lists the reference points so you can see the numbers behind the picture.
| Stage | Feeding days per week | Insects per feeding (dubia) | Insects per week | Typical weight (g) |
|---|---|---|---|---|
| Hatchling (0–2 mo) | 7 | 4–8 tiny | 28–56 | 3–12 |
| Juvenile (2–6 mo) | 7 | 5–10 small | 35–70 | 12–45 |
| Sub-adult (6–12 mo) | 5 | 5–8 medium | 25–40 | 45–66 |
| Adult (1–10 yr) | 3 | 5–8 medium | 15–24 | 50–80 |
| Senior (10+ yr) | 3 | 4–7 easy-to-eat | 12–21 | Varies |
These numbers are guides, not laws. A lean, active juvenile may do best slightly above the range, and a heavy adult may need to sit below it. The weight check inside the calculator is how you decide.
Feeding a Leopard Gecko by Life Stage
Hatchlings: build the frame
Hatchlings usually emerge after 45 to 60 days of incubation and live on their yolk reserves for the first days. Most take their first insects after their first shed, so do not worry if there is no appetite right away. Once eating, they need small meals every day. Insects should be tiny, such as pinhead crickets or newly hatched dubia nymphs, and every piece should fit comfortably between the eyes. I use a shallow dish so the baby does not have to chase prey across the enclosure and burn energy it cannot spare.
Juveniles: the growth spurt
From two to six months, weight climbs from about 12 grams to about 45 grams. Insects per week peak here, and calcium matters most. I weigh juveniles weekly and write the number down. A juvenile that has not gained for three weeks needs a closer look at temperatures, insect size and parasites before any change in portions.
Sub-adults: easing off
Between six and twelve months, growth in length slows and weight gain levels off. Feeding days drop from seven to about five. This is the age when well-meaning owners keep feeding juvenile amounts and end up with a heavy two-year-old. Check the tail: it should be plump, not bulging past the width of the body.
Adults: steady maintenance
Adults do well on feeding every two to three days, with about five to eight medium insects per session. Many adults eat fewer, and some lazy eaters are happy with five. If your gecko is active, bright and stable in weight, you have found its level.
Seniors: smaller and softer
Older geckos often eat less and chew more slowly. Offer easy-to-eat prey, keep warmth and water within easy reach and book a vet check twice a year. Unexplained appetite changes deserve a vet visit rather than a wait-and-see approach.
Best Feeder Insects for Leopard Gecko Diets
Variety is the best protection against nutritional gaps. I rotate at least two staples and keep fatty treats occasional.
| Feeder | Role | Notes |
|---|---|---|
| Dubia roaches | Staple | High protein, low fat, easy to keep and quiet. Natural calcium is low, so dust them. |
| Crickets | Staple | Accepted by almost every gecko and stimulate hunting. They need gut-loading and dusting, and can bite a resting gecko. |
| Black soldier fly larvae | Staple | Naturally calcium-rich, a good boost for growing animals. |
| Silkworms | Staple or treat | Soft, nutritious and useful for fussy eaters, but costly and short-lived. |
| Mealworms | Occasional | Hard shell and higher fat. Keep to a small share of the diet and avoid for hatchlings. |
| Superworms | Treat | Large, hard-shelled and fatty. Only for sub-adults and adults, and only occasionally. |
| Waxworms and butterworms | Treat | Very fatty. Best for appetite recovery or as a rare reward, ideally under veterinary guidance. |
More background on one widely used staple is available in this overview of the dubia roach (Blaptica dubia).
What not to feed
- Fireflies, which are toxic to reptiles.
- Wild-caught insects, which can carry pesticides or parasites.
- Fruit and vegetables. Leopard geckos are insectivores and do not digest plant matter well.
- Prey larger than the space between the eyes.
- Pinky mice as a regular food. They are very fatty and not part of a normal diet.
Insect Size and Gut-Loading
The simplest size rule is also the safest: no insect should be longer than the space between your gecko’s eyes. Overlarge prey raises the risk of choking, regurgitation and impaction, and it makes a baby afraid of feeding time. As a rough guide, hatchlings take insects up to about a quarter of an inch (6 mm), juveniles about a quarter to three-eighths of an inch, and adults up to about half an inch or a little more.
Gut-loading
A feeder insect is only as nutritious as its last meal. Feed crickets, roaches and larvae a quality insect diet and fresh vegetables for 24 hours before offering them. Skip dry-only diets. A well-fed insect passes its nutrition on to your gecko, while a starved one is little more than an empty shell.
Storing feeders
Keep feeders in a ventilated container with food, a hiding surface and a small source of moisture. Clean out dead insects daily. Healthy colonies are one of the cheapest ways to improve your gecko’s diet.
Calcium, Vitamins and Lighting
Bones, muscles and nerves all depend on calcium, and a growing gecko is building a skeleton at remarkable speed. Chronic calcium shortage leads to metabolic bone disease. Signs include tremors, a soft or bent jaw, swollen limbs and trouble walking. You can read a general description of metabolic bone disease, but any suspicion needs a veterinarian, not a web search.
- Calcium powder: At most feedings for hatchlings and juveniles, and at roughly two of every three feedings for adults.
- Multivitamin: Once a week for growing animals and every one to two weeks for adults, on a different day from heavy calcium dusting.
- Vitamin D3: Whether to use calcium with or without D3 depends on your lighting and your vet’s advice.
- Lighting: Leopard geckos are crepuscular and many keepers use no special lighting, while a growing number of keepers and vets offer low-output UVB with plenty of shade. Ask your vet what suits your setup.
Many keepers keep a small dish of plain calcium in the enclosure so the gecko can lick it as needed, which is a handy backup, though it should not replace dusting at meals.
Water and Moisture
Offer a shallow, clean water dish at all times and change it daily. Leopard geckos come from arid habitats but still need to drink, and a dish that is too deep is a drowning risk for a hatchling. Add a moist hide filled with damp moss or paper towel so your gecko can shed cleanly, since stuck shed on the toes is one of the most common problems in young animals. Keep the rest of the enclosure dry.
Signs of dehydration include wrinkled skin that stays pinched, sunken eyes, a thin tail and dark, hard urates. If you see them, check the water dish and the moist hide, and call your vet.
Feeding Routine and Timing
Leopard geckos are most active at dusk and dawn, so I feed in the late afternoon or evening when the animal is awake and warm. Offer insects from a shallow dish, tongs or a feeding ledge, and remove leftovers after about 15 minutes. Live crickets and some other feeders can bite a resting gecko, which is why I avoid leaving them in the enclosure overnight.
Digestion depends on heat, so make sure the warm side of the enclosure is at a surface temperature of roughly 88 to 92°F (31 to 33°C), with a cool side near 73 to 77°F (23 to 25°C). A cold gecko may refuse food or fail to digest it.
A typical adult feeding day
- Check temperatures and the water dish.
- Dust the insects in a cup with the day’s supplement.
- Offer the planned insects one at a time from tongs or a dish.
- Remove uneaten prey after about 15 minutes.
- Spot-clean droppings and note the weight on weigh-in days.
Weight and Body Condition: Is Your Gecko Eating the Right Amount?
A kitchen scale and your eyes together tell the story. Weigh your gecko weekly while young, monthly as an adult, and write the numbers down. The calculator compares your figure with the typical weight for the age, and between roughly 80 and 120 percent of typical is a healthy band.
The tail as a fat reserve
A leopard gecko stores fat in its tail, so the tail is a good body-condition gauge. A healthy tail is plump and tapers smoothly. A very thin tail, or visible hip bones, suggests underfeeding or illness. A tail that is bulging, with fat pads on the body, suggests overfeeding.
Signs of overfeeding
- A tail much wider than the body with rounded fat pads
- A heavy belly that drags on the ground
- Reduced activity and reluctance to climb
Signs of underfeeding or illness
- A thin tail and visible hip bones
- Slow growth in a baby
- Weight loss despite normal feeding, which suggests parasites or illness
If weight sits outside the healthy band, adjust gradually. A heavy gecko gets fewer feeding days and smaller counts, while a light one gets an extra feeding day and a vet check. Quick crash diets are dangerous for reptiles.
Appetite Changes: Shedding, Winter Slowdowns and Picky Eating
Appetite is not constant. Geckos often eat less around a shed, after a move, when temperatures drop or during a winter slowdown. Some adults eat very little for weeks in cooler months and sleep more. A first slowdown should be checked with a reptile vet to rule out parasites, infection or poor husbandry.
Quick troubleshooting checklist
- Check the warm-side surface temperature with an infrared thermometer.
- Look for signs of an upcoming shed or recent stress.
- Confirm feeders are fresh, the right size and gut-loaded.
- Try a different feeder species, such as a silkworm or a small dubia.
- Offer food at dusk, when your gecko is most active.
- Call a reptile vet if a juvenile refuses food for several days, or an adult for more than two weeks without a clear reason.
Impaction
Impaction means a blockage in the gut. Causes include oversized prey, loose substrate such as sand being swallowed and low temperatures that slow digestion. Warning signs are straining, a swollen belly, refusing food and no droppings. It needs a vet, so do not try home remedies.
Gravid Females and Seniors
A female producing eggs has much higher calcium and calorie demands. She may eat more before laying and less just before, and she needs a lay box with moist substrate. Keep calcium available, feed a little more often and ask a vet about supplements. Egg binding is an emergency, with signs such as straining, lethargy and a swollen belly.
Seniors need gentler handling of their diet. Offer easy-to-eat prey and weigh them monthly so that small losses are caught early. A reptile vet can run bloodwork and a fecal test and suggest supportive feeding if appetite fades.
Common Feeding Mistakes
- Feeding adults juvenile amounts. Daily feeding suits babies, not settled adults.
- Oversized insects. Anything longer than the space between the eyes raises choking and impaction risks.
- Skipping gut-loading and dusting. An empty insect is a poor meal.
- Relying on one feeder. Variety prevents deficiencies.
- Leaning on mealworms and waxworms. Both are fatty or hard-shelled and best kept occasional.
- Offering fruit and vegetables. Leopard geckos are insectivores.
- Feeding a cold gecko. Without heat, food sits undigested.
- Ignoring weight trends. A scale is your best early warning system.
Hygiene note
Reptiles can carry Salmonella without looking ill. Wash your hands after handling the gecko, its dishes or the enclosure, and keep feeding tools away from the kitchen. The CDC’s Salmonella information explains the precautions in detail.
Related Pet Tools You May Find Helpful
The same stage-by-stage thinking applies across species, and you can find many more planners on Pet Calculator Hub. If you share your home with a dog, the dog age calculator shows how age changes care needs for canines. For planning daily energy for dogs and cats, the pet alliance calorie calculator is a handy companion. And if you keep an aquarium beside your gecko’s enclosure, the fish inch per gallon calculator helps you avoid overstocking, the same right-sizing principle that makes a Leopard Gecko Feeding Calculator useful.
Leopard Gecko Feeding Calculator FAQs
How often should I feed a leopard gecko?
Hatchlings and juveniles are usually fed every day, sub-adults every day to every other day, and healthy adults every two to three days. Weight and body condition decide whether to adjust the schedule.
How many insects should a leopard gecko eat per feeding?
A common starting range is about 4 to 8 tiny insects for a hatchling, 5 to 10 small insects for a juvenile and 5 to 8 medium insects for a sub-adult or adult. Stop when your gecko stops chasing food, and remove leftovers after about 15 minutes.
What size insects should I feed my leopard gecko?
Feed insects no longer than the space between your gecko’s eyes. Oversized prey raises the risk of choking, regurgitation and impaction.
Can leopard geckos eat fruit or vegetables?
No. Leopard geckos are insectivores and do not digest plant matter well. Their diet should consist of gut-loaded, appropriately sized feeder insects with supplements.
What are the best feeder insects for leopard geckos?
Dubia roaches, crickets, black soldier fly larvae and silkworms make good staples. Mealworms, superworms and waxworms are best used as occasional treats because of their hard shells or high fat content.
How much calcium does a leopard gecko need?
Growing geckos are usually given calcium powder at most feedings, while adults get it at roughly two of every three feedings, plus a multivitamin every one to two weeks. Follow your reptile vet’s advice about vitamin D3 for your lighting setup.
Why is my leopard gecko not eating?
Common reasons include a cool enclosure, stress after a move, shedding, a winter slowdown, the wrong insect size and illness or parasites. If a juvenile refuses food for several days, or an adult for more than two weeks without a clear reason, contact a reptile veterinarian.
Can I leave live insects in the enclosure overnight?
It is better not to. Crickets and some other feeders can bite a resting gecko. Offer prey in a shallow dish or by tongs and remove leftovers after the meal.
Is the Leopard Gecko Feeding Calculator accurate?
It gives evidence-informed starting ranges for typical captive leopard geckos. Appetite, body condition, temperature and health vary, so adjust portions to your gecko’s weight trend and your veterinarian’s advice.
Final Thoughts
Good feeding comes down to matching the schedule to the life stage and then watching the animal. Use the Leopard Gecko Feeding Calculator to set a sensible starting plan, weigh your gecko on a schedule and let behavior, tail condition and your veterinarian fine-tune the details. Babies need daily meals of tiny insects and frequent calcium, juveniles need steady protein while they grow and adults thrive on a lighter, every-two-to-three-days rhythm. Keep temperatures correct, rotate your feeders and keep supplements on a schedule, and you give your gecko the best chance of a long, healthy life.
Disclaimer: This tool and article are for general education and are not a substitute for advice from a qualified reptile veterinarian.