The library

All 58 browser tools.

Search or filter calculators, converters, generators, and everyday utilities. Every tool works in your browser with no account required.

Showing 58 of 58 tools.

Percentage Calculator

Work out percentages, changes, and proportions in a blink.

Age Calculator

Find an exact age between two dates, down to the day.

Discount Calculator

See the sale price and exactly what you save.

BMI Calculator

Estimate body mass index from your height and weight.

Length Converter

Switch between metric and imperial length units.

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin instantly.

Word Counter

Count words, characters, sentences, and reading time.

Case Converter

Transform text to sentence, title, upper, or lower case.

Password Generator

Make a strong, private password in your browser.

QR Code Generator

Turn a link or short message into a scannable code.

Loan Calculator

Estimate monthly repayments, total repayment, and interest.

Compound Interest Calculator

See how an investment can grow with regular contributions.

Savings Calculator

Plan regular savings and see the estimated future balance.

GST/VAT Calculator

Add tax to a price or remove it from an inclusive total.

Date Calculator

Add or subtract days, months, and years from any date.

Days Between Dates Calculator

Count the exclusive days, weeks, and hours between two dates.

Weight Converter

Convert metric and imperial weight units in every direction.

Volume Converter

Convert kitchen and metric volume units with clear labels.

Speed Converter

Switch between m/s, km/h, mph, ft/s, and knots.

Character Counter

Track characters, spaces, words, lines, and paragraphs.

Mortgage Calculator

Estimate monthly payments for a home purchase or refinance.

Fuel Cost Calculator

Estimate how much fuel a trip will use and what it will cost.

Hours Calculator

Find net working hours from a start time, end time, and break.

Time Duration Calculator

Find the duration between two times, including overnight.

Area Converter

Convert between metric and imperial area units instantly.

Data Storage Converter

Convert between decimal (KB, MB) and binary (KiB, MiB) storage units.

Tip Calculator & Bill Split

Work out the tip and split a bill across any number of people.

Recipe Scaler

Scale a recipe up or down by changing the number of servings.

Password Strength Checker

Check how strong a password is, entirely in your browser.

Random Number Generator

Generate random integers or decimals within any range.

Mortgage Overpayment Calculator

See how extra repayments reduce your interest and shorten your loan term.

Investment Return Calculator

Project the growth of an investment with regular contributions.

Break-Even Calculator

Find how many units you need to sell to cover your costs.

Business Days Calculator

Count weekday-only days between two dates, both inclusive.

Energy Converter

Convert between joules, calories, kilowatt-hours, BTU, and more.

Pressure Converter

Convert between pascals, bar, PSI, atm, torr, and mmHg.

Frequency Converter

Convert between Hz, kHz, MHz, GHz, and RPM.

UUID Generator

Generate cryptographically random UUID v4 values in your browser.

Timestamp Converter

Convert Unix timestamps to readable dates, and vice versa.

Scientific Calculator

Evaluate expressions with powers, square roots, and percentages.

Calorie Calculator

Estimate daily calorie needs from your body and activity profile.

Sleep Calculator

Find estimated bedtimes or wake-up times using sleep cycles.

GPA Calculator

Calculate a weighted GPA from grade points and course credits.

Final Grade Calculator

Find the final assessment score needed to reach your target grade.

Percentage Change Calculator

Calculate percentage increase, decrease, and absolute difference.

Profit Margin Calculator

Calculate profit or loss, margin percentage, and markup percentage.

Pace Calculator

Calculate distance, elapsed time, or running pace.

Concrete Calculator

Estimate concrete volume from length, width, and depth.

Countdown Calculator

Count down the days, hours, minutes, and seconds to a future date.

Paint Calculator

Estimate paint litres from surface area, coats, and coverage.

Salary to Hourly Calculator

Turn an annual salary into hourly, weekly, and monthly pay.

Debt Payoff Calculator

Estimate how long a balance will take to repay at a fixed payment.

Mortgage Affordability Calculator

Estimate a home price from income, debts, deposit, rate, and term.

Test Grade Calculator

Convert points earned into a test percentage and letter grade.

Average Calculator

Find the mean, median, minimum, and maximum of a number list.

Fraction Calculator

Add, subtract, multiply, or divide two fractions.

Time Zone Converter

Convert a date and time between common time zones.

Square Footage Calculator

Calculate the area and perimeter of a rectangular room or space.