Project Description
Free online calculators for everyday math, finance & health
CalculatorBench is a toolkit of fast, no-frills calculators for the kind of math people actually run into day to day — loan payments, BMI, tips, GPA, unit conversions, and dozens more. Every calculator runs entirely in your browser, so nothing you type is ever uploaded or stored.
- 🔒 No sign-up required
- ⚡ Instant, accurate results
- 🧮 Numbers stay on your device
📂 Browse by Category
- 🏋️ Health & Fitness — 24 calculators for BMI, TDEE, macros, body fat, sleep, and pace
- 💰 Finance & Loans — 26 calculators for loans, mortgages, savings, interest, and investing
- ➗ Everyday Math — 5 calculators for percentages, tips, discounts, fuel and EV costs
- 🎓 Education — 1 calculator for GPA and grades
- 📏 Unit Conversions — 4 calculators for length, weight, temperature, and aspect ratios
- 📅 Time & Date — 2 calculators for age, business days, and durations
- 🏢 Business & Fees — 10 calculators for payment processor fees, marketplace fees, and startup metrics
- 🤖 AI Tool Costs — 4 calculators for token counting and API pricing across OpenAI, Claude, and Gemini
- 📐 Math & Statistics — 15 calculators covering algebra, arithmetic, and statistics
- 💵 Payroll & Pay — 12 calculators for salary conversions, overtime, and gross-to-net pay
- 🎮 Gaming — 10 calculators for in-game currency, gacha odds, and esports stats
✨ Highlights
- BMI, TDEE & Macro Calculators — everyday health metrics using standard clinical formulas
- Loan, Mortgage & EMI Calculators — full payment breakdowns with total interest
- AI Token Cost Calculators — estimate API spend across OpenAI, Claude, and Gemini
- Fee Calculators — see exactly what Stripe, PayPal, Amazon FBA, and Etsy take from a sale
- Gaming Calculators — convert Robux and V-Bucks to real money, check gacha pull odds, and more
Built for quick answers. Zero sign-up. Numbers stay on your device.