All Your Calculations, In One Place
37+ free calculators, built for the USSmart calculators for money, math, and everyday life
Search 37 free, accurate calculators for money, home, education, and daily decisions — no sign-up required.
Popular
Popular calculators
Percentage Calculator
Money
Find percentages, increases, and decreases instantly.
Mortgage Calculator
Money
Estimate your monthly mortgage payment.
Tip Calculator
Money
Calculate tips and split the bill fairly.
BMI Calculator
Everyday
Calculate Body Mass Index.
Age Calculator
Date & Time
Calculate exact age from a birth date.
GPA Calculator
Education
Calculate your grade point average.
Loan Calculator
Money
Estimate monthly loan payments.
Sales Tax Calculator
Money
Calculate sales tax and total price.
Categories
Browse by category
Every calculator on CalcNests is organized into one of seven categories, so you can go straight to the tool you need.
Money
Budgeting, loans, tips, taxes, and everyday financial math.
Math
Core math tools for percentages, averages, and more.
Date & Time
Ages, durations, countdowns, and date arithmetic.
Education
GPA, grades, and academic planning calculators.
Home
Household, mortgage, and home-project calculators.
Everyday
Health, units, and daily-life conversions.
US Tools
Calculators built around US-specific conventions.
US Tools
Featured US tools
Calculators built around US-specific conventions like federal tax brackets and state minimum wage.
Minimum Wage Calculator
US Tools
Calculate earnings at minimum wage by state.
State Sales Tax Calculator
US Tools
Calculate sales tax using each state's actual rate.
State Paycheck Calculator
US Tools
Estimate take-home pay including state income tax.
State Mortgage Calculator
US Tools
Estimate a mortgage payment using state property tax rates.
Why CalcNests
Math you can trust, in seconds
Everyday decisions — a tip, a loan, a grade, a move-in date — often come down to a calculation most people don't have time to do carefully. CalcNests exists to make that math instant, correct, and free, so a five-minute decision doesn't need a spreadsheet.
Built for accuracy
Every calculator uses transparent, correct formulas — no shortcuts, no guesswork.
Fast by design
Lightweight pages and instant results, with no sign-up and no clutter in the way.
Made for the US
US units, tax conventions, and currency by default, so results match what you expect.
FAQ
Frequently asked questions
Are CalcNests calculators free to use?
Yes. Every calculator on CalcNests is free, with no account or sign-up required.
How accurate are the results?
Each calculator is built on standard, verifiable formulas. Results are estimates intended for planning — for decisions involving taxes, loans, or medical matters, confirm with a licensed professional.
Do I need to create an account?
No. All calculators run instantly in your browser with no account needed.