One trustworthy answer to every money, health & math question.
230+ peer-reviewed calculators with transparent assumptions, cited sources, and zero data leaving your browser.
Press ⌘K from anywhere — search across all 230 calculators.
Calculators, organized around real decisions.
Buy a home
Right-size the loan, the down payment, and the long-term cost.
- Mortgage
- EMI
- Rent vs buy
Start an SIP
Project realistic wealth, factor in inflation, plan a step-up.
- SIP
- Step-up SIP
- Goal SIP
Plan retirement
Stress-test the corpus, withdrawal rate, and tax wrappers.
- Retirement
- NPS
- SWP
Why people trust Calc Center
Peer-reviewed math
Every formula is open-source and cited. Audit it on GitHub before you trust the number. Learn more →
Updated to current rates
Tax slabs, contribution caps, and reference rates tracked against primary sources — with a public changelog. Learn more →
100% client-side
Inputs never leave your device. No accounts, no tracking pixels, no analytics on your money. Learn more →
What people reach for first.
Browse the full catalogue.
Grouped by category. Each tool ships with shareable URLs, PDF export, and a citation footer.
Finance
Loans, investments, taxes and retirement.
Mortgage Calculator
Estimate monthly mortgage payments with taxes and insurance.
Loan Calculator
Calculate payments for any amortized loan.
Auto Loan Calculator
Plan a car loan with trade-in, tax and fees.
Interest Calculator
Compute simple and accrued interest.
Payment Calculator
Work out the payment or the term for a loan.
Retirement Calculator
Project your nest egg at retirement.
Fitness & Health
Body, nutrition and wellness metrics.
BMI Calculator
Body Mass Index and healthy weight range.
Calorie Calculator
Daily calorie needs for goals.
Body Fat Calculator
Body fat percentage (U.S. Navy method).
BMR Calculator
Basal metabolic rate at rest.
Macro Calculator
Protein / carb / fat split for your calories.
Ideal Weight Calculator
Several clinical formulas.
Math
Scientific, algebraic and statistical tools.
Scientific Calculator
Full-featured expression calculator.
Fraction Calculator
Add, subtract, multiply and divide fractions.
Percentage Calculator
All common percentage problems.
Triangle Calculator
Solve any triangle from three knowns.
Volume Calculator
Common 3D volumes.
Standard Deviation Calculator
Mean, variance and SD for a data set.
Other
Dates, grades, networking and more.