SolvePlace is a free collection of 15 online calculators and converters for everyday tasks: finding an exact age, counting the days between two dates, converting units, estimating a loan payment and more. Every tool runs in your browser, needs no account, and works on phones, tablets and computers.

Our 15 free calculators

1. Age Calculator - Find your exact age in years, months and days, see totals in months, weeks and days, and check your next birthday.
2. Date Calculator - Count the days between two dates or add days to a date to plan an upcoming event. For working-day counts, use the Business Days Calculator.
3. Percentage Calculator - Find a percentage of a number or calculate a percentage increase or decrease to understand how a value has changed.
4. Time Calculator - Find the time between two clock times, or add and subtract hours, minutes and seconds, including across midnight.
5. Unit Converter - Convert length, weight, temperature, area, volume, speed and digital storage.
6. Fuel Cost Calculator - Estimate how much to budget for gas on a trip using your travel distance, vehicle fuel economy and fuel price.
7. Work Hours Calculator - Calculate working time after an unpaid lunch break and use an hourly rate to estimate daily gross earnings.
8. Discount & Tip Calculator - See how much a percentage discount saves you, work out a tip, or divide a restaurant bill among friends.
9. Loan Calculator - Estimate the monthly payment, total interest and total repayment for a fixed-rate loan. Results are estimates and do not include fees, insurance or taxes.
10. BMI Calculator - Calculate your body mass index in metric or imperial units and see the WHO adult weight category and a healthy weight reference range for your height. BMI is a general screening measure, not a medical diagnosis.
11. Password Generator - Generate random passwords in your browser with a custom length, uppercase and lowercase letters, numbers and symbols.
12. Average Calculator Calculate arithmetic and weighted averages, median, mode, sum, count and range instantly. Free online statistics calculator with optional weights.
13. Business Days Calculator Count business days between dates, compare calendar and weekend days, and optionally include Saturdays. Free date calculator; holidays are not deducted.
14. Compound Interest Calculator Estimate investment growth with an initial deposit, monthly contributions and monthly or yearly interest. Compare total invested, total interest earned and final balance to plan your savings.
15. Scientific Calculator Use basic arithmetic, square roots, powers, percentages, parentheses and pi in one free calculator. A clear display and keyboard support make everyday math easy on desktop and mobile.

Why use SolvePlace?

Free to use: no account and no subscription.
Your inputs stay in your browser: calculator values are not sent to or stored on our servers.
Fast and mobile-friendly: simple pages that work on phones, tablets and computers.
Available in 8 languages: English, Portuguese, Spanish, French, German, Italian, Japanese and Chinese.

SolvePlace is supported by advertising. Ad partners such as Google may use cookies, as explained in our Privacy Policy.

Frequently Asked Questions (FAQ)

Are the calculation results accurate?: The calculators use standard formulas and are designed to give clear, reliable estimates. Results are for general information only, so please check your inputs and confirm important figures, especially for loans, health or legal matters, with a qualified professional.
Do I need to create an account or sign up to use SolvePlace?: No. You never need to enter an email address, create a password or register an account.
Can I use these calculators on my smartphone?: Yes. The pages are designed to work on phones, tablets and computers.
What types of calculators does SolvePlace offer?: SolvePlace offers 15 free tools: Math (percentage, average and scientific calculators), Dates (age, date duration and business days), Finance (loan, compound interest, discount & tip, fuel cost and work hours), Security (password generator) and Health (BMI calculator). Calculations run in your browser.
Is SolvePlace really free?: Yes. All tools are free to use. The site is supported by advertising.