Free Online Calculators: Search 6,718 Tools
Search 6,718 free online calculators and converters. Start typing, filter by category, country or type, or browse the full index. Where a calculator depends on an external rate, standard or dataset, the supporting source is shown with the date it was checked. Pure mathematical identities are documented and independently tested instead.
Popular calculators
- Age Calculator: Calculate Exact Age, Days Lived, and More
- Amortization Schedule Calculator 2026: Monthly Breakdown
- BMI Calculator: Free Body Mass Index Calculator
- BMR Calculator
- Body Fat Calculator 2026: US Navy Method Body Fat Percentage
- Calorie Calculator
- Celsius to Fahrenheit Converter
- Compound Interest Calculator
- Compound Interest Calculator 2026: Monthly Contributions
- Concrete Calculator: Cubic Yards, Cubic Feet and Bags
- Date Calculator
- Fraction Calculator
- GPA Calculator: Calculate Semester GPA (4.0 Scale)
- Grade Calculator: Find Your Current Grade From Assignments
- Ideal Weight Calculator
- Loan Calculator: Monthly Payment
- Macro Calculator
- Mortgage Calculator 2026: Monthly Payment, Taxes, PMI
- Ohm's Law Calculator: Voltage, Current, Resistance, Power
- One-Rep Max Calculator: 1RM Strength Estimator (Epley, Brzycki, Lander)
- Ovulation Calculator
- Paint Calculator: Gallons Needed for Wall Area
- Percentage Calculator: Four Essential Percentage Tools
- Percentage Change Calculator
- Pregnancy Due Date Calculator
- Resistor Color Code Calculator (4-Band)
- Savings Calculator: Future Value of Regular Deposits
- Scientific Notation Calculator: Convert to/from a x 10^n
- Square Footage Calculator: Rectangle, Circle, Triangle, Trapezoid
- Standard Deviation Calculator
- TDEE Calculator: Daily Calorie Needs (Mifflin-St Jeor)
- Tip Calculator: Calculate Tips and Split Bills
- Voltage Drop Calculator: NEC Wire Run Voltage Loss
Recently updated
- 529 Tax Benefit by State: States Give You Nothing 2026-08-09
- 70 Years of the Fed Funds Rate: to Near Zero 2026-08-09
- Employer Unemployment Tax by State: The x Gap 2026-08-09
- Estate and Inheritance Tax by State: Only Charge Either 2026-08-09
- Gas Tax by State: All 50 States Compared 2026-08-09
- Minimum Wage Purchasing Power: Buys % Less Than 2026-08-09
- Property Tax by County: All US Counties Ranked 2026-08-09
- Unemployment Benefits by State: All 51 Compared 2026-08-09
- Disability Insurance Needs Calculator: How Much Coverage 2026-07-28
- Federal Funds Rate History (1955-2025): Annual Averages 2026-07-28
- Federal Minimum Wage History (1938-2026): Every Rate 2026-07-28
- Lease vs Buy a Car Calculator: Which Is Cheaper 2026-07-28
- Life Insurance Needs Calculator: How Much Coverage (DIME) 2026-07-28
- Social Security Break-Even Calculator: 62 vs 67 vs 70 2026-07-28
- Social Security Wage Base History (1937-2026) 2026-07-28
- Standard Deduction History (2019-2026) by Filing Status 2026-07-28
- 30-Year Mortgage Rate History (2000-2024): Annual Averages 2026-07-24
- Nanny Tax Calculator 2026: Household Employer Taxes 2026-07-24
- 1099 Tax Calculator 2026: Self-Employment Tax for Freelancers 2026-07-15
- ACA Subsidy Calculator 2026: Premium Tax Credit Estimate 2026-07-15
- Crypto Tax Calculator 2026: Capital Gains on Bitcoin & Crypto 2026-07-15
- FUTA Tax Calculator 2025: Federal Unemployment Tax 2026-07-15
- Income-Driven Repayment Calculator 2026: IBR Student Loan Payment 2026-07-15
- Medicare IRMAA Calculator 2026: Part B & Part D Surcharge 2026-07-15
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- General 1,001
- Unit converters 828
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- Woodworking and joinery 41
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- Cryptography and infosec math 38
- Pregnancy and family 35
- Productivity and time management 33
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Browse the complete index of 6,718 calculators →
This finder searches the 6,718 English calculators. Counting every language and each US state and county variant, the site has 45,965 pages in total; see the count methodology.