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- BMI Calculator
Calculate your Body Mass Index from height and weight.
- Calorie Deficit
Calculate your TDEE and calorie targets for weight loss using the Mifflin-St Jeor equation.
- Car Loan
Calculate monthly car payments, total cost, and interest.
- Compound Interest
See how your investments grow with the power of compound interest over time.
- Discount & Tax
See the final price after discount and sales tax — with effective savings.
- Electricity Bill
Estimate your monthly electricity bill from appliance usage.
BMI Calculator
Calculate your Body Mass Index from height and weight.
Calorie Deficit
Calculate your TDEE and calorie targets for weight loss using the Mifflin-St Jeor equation.
Car Loan
Calculate monthly car payments, total cost, and interest.
Compound Interest
See how your investments grow with the power of compound interest over time.
All calculators
- Fuel CostCalculate fuel costs for trips and estimate your monthly/yearly gas budget.
- Factorio — Science FactorySet your target science/min — get the EXACT machine, belt, and power counts for a red + green science factory, raw ore all the way to the finished pack. Flip on 🛡️ Military for a fully oil-free military line, and dial in mining productivity. Edit the recipe table and the whole factory rebalances live.
- Genshin Impact DamageThe full multiplicative pipeline — ATK × Talent × DMG% × Crit × DEF × RES × Reaction — with every multiplier exposed as a live slider.
- Genshin / HSR — Gacha Pity PlannerEnter your pity, saved primogems, and 50/50 status — get pulls affordable, odds of landing the 5★, and whether you can guarantee it at hard pity. The spreadsheet every gacha player keeps, made live. ⚠️ Odds use the published soft-pity ramp model — a solid estimate, not a datamined exact.
- Old School RuneScape — Skill Training PlannerSet your current and target level — get the exact XP, actions, GP, and hours for every training method, ranked cheapest-first. The same question every OSRS wiki + spreadsheet answers, in one editable table. Edit a method's XP/cost/rate and the whole plan re-ranks live.
- Pokémon Damage CalculatorGen-9 single-target damage, matched to the Smogon calc's core. The full 18×18 type chart is built in — pick your move type and the foe's two types and effectiveness is looked up automatically, no more picking the multiplier by hand. Get the damage range, % of the foe's HP, the full 16-roll spread, and the OHKO verdict.
- Stardew Valley — Crop Profit PlannerRank every crop by gold/day for the season — matched to the real Stardew Profits calculator. Dial in 🌟 farming level, ⚗️ fertilizer, 👨🌾 Tiller / 🎨 Artisan / 🚜 Agriculturist, and 🏭 processing, then watch the table re-sort live. Every assumption is a visible slider or toggle.
- Hourly to SalaryConvert hourly rates to annual salary with tax deductions and overtime.
- Mortgage CalculatorCalculate monthly payments, total interest, and lifetime cost for any home loan.
- Profit MarginCalculate gross margin, operating margin, and markup from revenue and costs.
- Recipe ScalerScale any recipe up or down with automatic metric conversions.
- Rent vs BuyCompare the monthly cost of renting versus buying a home.
- Retirement PlannerProject your retirement savings growth and estimated monthly income.
- Running PaceCalculate your required pace, speed, and split times for any race distance.
- Sales TaxCalculate sales tax forward and reverse.
- Savings GoalCalculate the monthly savings needed to reach your financial goal on time.
- Tax BracketEstimate your federal income tax and effective tax rate.
- Temperature ConverterConvert between Fahrenheit, Celsius, and Kelvin with common benchmarks.
- Tip CalculatorCalculate tips at any percentage and split the bill evenly between friends.
- Water IntakeCalculate daily water needs based on weight and activity level.
- 1031 Exchange TimelineTrack critical identification and exchange deadlines for 1031 tax swaps.
- 401k ContributionEstimate annual 401(k) contributions, employer match, and 30-year growth at 7% return.
- Kitchen SinkEvery working decorator + row type — the canonical reference. Visit with ?lab to flip styles and check coverage.
- 📊 Chart ShowcaseEvery visualization Instacalc draws — each from a one-line function call over plain data.