Calculators
Simple calculators that give you an answer immediately: percentages, age, date differences, and compound interest. No accounts, no ads above the result, no data leaving your browser.
20 tools in this category.
Tools in Calculators
Percentage Calculator
Three percentage tools in one: percent of a value, ratio as a percent, and percent change.
Calculators
Age Calculator
Find the exact age in years, months, and days — plus totals and the countdown to the next birthday.
Calculators
Date Calculator
Count the days between two dates, or add and subtract days from any date.
Calculators
Compound Interest Calculator
Project savings growth with compound interest and monthly contributions, year by year.
Calculators
Loan Calculator
Calculate monthly payments, total interest, and a full amortization schedule for any loan.
Calculators
Mortgage Calculator
Estimate monthly mortgage payments, including down payment, property tax, and insurance.
Calculators
Profit Margin Calculator
Calculate profit, margin, and markup from cost and selling price — or find the price needed for a target margin.
Calculators
Grade Calculator
Average your grades and work out what you need on the final to reach your target.
Calculators
Break-Even Calculator
Find out how many units you must sell to cover your costs and start making a profit.
Calculators
VAT Calculator
Add or remove VAT on any amount. Choose a standard rate or enter your own.
Calculators
BMI Calculator
Calculate your Body Mass Index and see where you fall on the healthy range.
Calculators
Tip Calculator
Calculate tip and split a bill fairly across any number of people. Quick presets for 15%, 18%, 20%, 25%.
Calculators
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from any date. Handles month-end and leap-year rollovers.
Date & Time Tools
Salary Calculator
Convert between hourly, daily, weekly, biweekly, monthly, and annual salary. Adjust hours/week and weeks/year.
Calculators
Countdown Timer
Count down to a specific date and time. Set a target, watch the days/hours/minutes/seconds tick down live.
Date & Time Tools
NewGPA Calculator
Calculate your weighted GPA from course grades and credits. Supports 4.0, 4.3, 5.0, 10.0, and percentage scales.
Calculators
NewCalorie Calculator (BMR + TDEE)
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE). Includes a goal-adjusted daily calorie target.
Calculators
NewStopwatch
A clean online stopwatch with laps, millisecond precision, and keyboard shortcuts. Runs in your browser.
Date & Time Tools
NewPomodoro Timer
A Pomodoro timer with 25/5/15 defaults. Focus, short break, long break, and session counter. Customizable phase lengths.
Date & Time Tools
NewPermutation & Combination Calculator
Compute nPr and nCr, with optional listing of all arrangements or subsets. Bounded for huge counts.
Math Tools