Free Online Calculators
Handle everyday number questions in focused browser calculators. Estimate costs, compare dates, calculate grades, convert pay, and check loan payments without opening a spreadsheet.
All calculators tools
Choose the focused utility that matches the result you need.
Age Calculator
Calculate exact age in years, months and days for any date.
BMI Calculator
Estimate body mass index with metric or imperial measurements.
Percentage
Solve percent-of, what-percent and percentage-change calculations.
Discount
Find sale price, savings and optional tax after a discount.
GPA Calculator
Calculate weighted GPA from course credits and grade points.
Date Difference
Count days, weeks and calendar distance between two dates.
Fuel Cost
Estimate trip fuel use, total spend and per-person cost.
Electricity Cost
Estimate appliance energy use and electricity cost.
Salary
Convert hourly, weekly, monthly and annual pay with estimated net income.
Loan Calculator
Estimate monthly loan payments, interest and payoff time.
How to choose the right tool
Start with the result the next step in your workflow expects. A smaller purpose-built utility is usually easier to test and explain.
- Use the calculator that matches the question instead of forcing a spreadsheet formula.
- Treat salary and loan results as estimates when taxes, fees or compounding rules vary.
- Check units before comparing fuel, BMI or electricity values.
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About this collection
Are these calculators tools free?+
Yes. Every core tool in this collection can be used without payment or account registration.
Do the tools work on phones and computers?+
They are designed for current mobile and desktop browsers. Test important event, export or print workflows on the device you will actually use.
Is an account required?+
No. An optional account adds private history, but it does not unlock the core tool experience.