Universal Calculators

Privacy-first calculators in your browser — no signup, no install.

All inputs are processed only in your browser — never sent to a server.
⭐ Live now
LIVE
📈
Compound Interest
Future value with monthly contributions
 LIVE
⚖️
BMI Calculator
Body mass index, WHO standard
 LIVE
🔥
Calorie / TDEE
BMR + activity, protein, water
 LIVE
🏦
Loan Calculator
Monthly payment, total interest

💰 Finance

Investment, savings, and loan planning.

📈
Compound Interest
Lump sum + monthly contributions, future value, return multiple
💰
Savings Calculator
Maturity value with simple or monthly compound interest
🏦
Loan Calculator
Monthly payment, total interest, equal monthly or equal principal

🩺 Health

BMI, basal metabolic rate, body composition.

⚖️
BMI Calculator
Body mass index with WHO classification + healthy weight range
🔥
Calorie / TDEE
BMR + activity multiplier (Mifflin–St Jeor) + protein and water
📏
Body Fat (Navy)
Tape measurement formula + CUN-BAE comparison + ACE classification
⚖️
Ideal Weight
BMI 22 + Devine / Robinson / Miller / Hamwi medical formulas

🗓️ Lifestyle

Dates, time, and everyday utilities.

📅
D-Day Calculator
Days between dates — anniversaries, deadlines, milestones

FAQ

Is my data uploaded anywhere?
No. All calculations happen inside your browser using JavaScript and WebAssembly. Your inputs never leave your device. This is a static site with no server-side processing.
Can I use these results for tax filing or medical decisions?
No. All calculations are estimates for reference only. Use official tools or consult licensed professionals (tax accountants, doctors, financial advisors) for accurate, decision-grade results.
What calculators are available in English?
Eight universal calculators: compound interest, BMI, calorie/TDEE, body fat (Navy method), ideal weight, savings, loan, and D-Day. Korean-specific tools (Korean tax, real estate law, labor law) are not translated as they are jurisdiction-bound — see the Korean version of the site for those.
Does it work on mobile?
Yes. Chrome on Android, Samsung Internet, and Safari on iOS are all supported, and you can install it as an app via "Add to Home Screen" (PWA). All calculations work offline once installed.