Browse by category
Use these category hubs to explore calculators by topic and move between related tools faster.
Finance calculators
Debt, savings, income, mortgages, ratios, and planning tools.
Business calculators
Margins, markups, break-even, ratios, tax, and business planning tools.
Percentage calculators
Percentage change, discounts, tax, tips, markup, and margin tools.
Unit conversion calculators
Length, weight, temperature, area, volume, speed, and common unit converters.
Health calculators
BMI, calories, BMR, TDEE, hydration, protein, ideal weight, and fitness estimates.
Math calculators
Averages, medians, modes, ratios, statistics, geometry, slopes, and weighted values.
Household calculators
Paint, concrete, flooring, roofing, fencing, tile, gravel, and home project estimates.
Date and time calculators
Ages, date gaps, business days, countdowns, durations, and time calculations.
Everyday calculators
Tip, shopping, kitchen, discount, date, fuel, and practical daily tools.
Finance calculators
Estimate payments, savings, interest, debt, net worth and other common money decisions.
Mortgage Calculator
Estimate monthly mortgage repayments from loan amount, interest rate, and loan term.
Mortgage Amortization Calculator
Estimate principal, interest, and total mortgage cost.
Extra Payment Mortgage Calculator
Estimate interest savings from extra mortgage payments.
Offset Account Savings Calculator
Estimate simple mortgage offset interest savings.
Loan Payment Calculator
Estimate monthly loan repayments, total repayment, and interest from amount, rate, and term.
Loan Repayment Calculator for Monthly Payment Estimates
Estimate a monthly loan repayment from amount, rate, and term, with simple amortisation context.
Auto Loan Calculator
Estimate a car loan payment using vehicle price, deposit, interest rate, and loan term.
Rent vs Buy Calculator
Compare estimated monthly renting costs with estimated monthly home ownership costs.
Down Payment Calculator
Work out a down payment amount, down payment percentage, and remaining loan size from a home purchase price.
Refinance Savings Calculator
Compare current and new loan payments to estimate monthly refinance savings.
Credit Card Payoff Calculator
Estimate how long it may take to pay off a card balance and how much interest could be paid.
Debt Payoff Calculator
Estimate a debt payoff timeline using balance, rate, and monthly payment.
Debt Snowball Calculator
Estimate payoff time for a fixed debt payment.
Debt Avalanche Calculator
Estimate payoff time for high-interest debt.
Debt-to-Income Calculator
Compare monthly debt payments with gross monthly income.
Credit Utilization Calculator
Calculate credit usage as a percentage of total credit limit.
Savings Calculator for Future Balance and Interest Growth
Project future savings from a starting balance, contributions, interest rate, and term.
Savings Goal Calculator
Calculate the monthly saving needed to reach a target by a deadline.
Emergency Fund Calculator
Estimate an emergency fund target based on monthly essential expenses.
Compound Interest Calculator
Estimate growth from principal, contributions, interest rate, and time.
Simple Interest Calculator
Calculate interest using principal, annual rate, and time.
Investment Return Calculator
Estimate long-term investment growth.
Retirement Savings Calculator
Project retirement savings from current balance and return.
FIRE Calculator
Estimate a financial independence target.
Inflation Calculator for Future Price and Purchasing Power
Estimate how inflation changes future prices and purchasing power over time.
Net Worth Calculator
Estimate net worth by comparing assets and liabilities.
Salary Calculator
Convert pay amounts across hourly, weekly, monthly, and annual salary views.
Hourly to Salary Calculator
Convert hourly pay into weekly, monthly, and annual salary estimates.
Paycheck Calculator
Estimate take-home pay after a simple deduction percentage.
Pay Raise Calculator
Calculate new pay and raise amount from current pay and a percentage increase.
Overtime Calculator
Estimate overtime pay from hourly rate, regular hours, and overtime hours.
Commission Calculator for Sales Commission and Total Pay
Estimate sales commission and total pay from sales amount, rate, and base pay.
Business calculators
Calculate margins, markups, break-even points, ratios, depreciation and business planning numbers.
ROI Calculator for Return on Investment and Net Profit
Calculate return on investment from original cost and final value or gain.
Break-Even Calculator for Units and Revenue
Estimate how many units or how much revenue is needed to cover fixed and variable costs.
Business Profit Planner Calculator
Plan simple business profit from units sold, revenue per unit, and costs.
Margin Calculator for Profit Margin and Gross Profit
Calculate gross profit and margin percentage from selling price and cost.
Markup Calculator for Cost, Markup and Selling Price
Calculate selling price or markup percentage from cost and desired margin inputs.
Contribution Margin Calculator
Calculate contribution margin per unit and margin percentage.
Depreciation Calculator
Estimate straight-line depreciation from cost, salvage value, and useful life.
Current Ratio Calculator
Compare current assets with current liabilities.
Quick Ratio Calculator
Compare liquid assets with current liabilities.
VAT Calculator to Add or Remove VAT from Any Amount
Add VAT to a net amount or remove VAT from a gross amount.
Sales Tax Calculator
Add or reverse sales tax from a purchase price.
Discount Calculator
Calculate sale price and savings after a discount.
Percentage calculators
Work out percentages, increases, decreases, discounts, tips, tax, markup and margin.
Percentage Calculator to Find X% of Y
Find a percentage of a number, such as 15% of 200.
Percent Change Calculator
Calculate percentage change between an original value and a new value.
Percentage Increase Calculator
Calculate the percentage increase from one value to another.
Percentage Decrease Calculator
Calculate the percentage decrease from one value to another.
Discount Calculator
Calculate sale price and savings after a discount.
Markup Calculator for Cost, Markup and Selling Price
Calculate selling price or markup percentage from cost and desired margin inputs.
Margin Calculator for Profit Margin and Gross Profit
Calculate gross profit and margin percentage from selling price and cost.
Tip Calculator
Calculate tip amount, bill total, and per-person split.
Sales Tax Calculator
Add or reverse sales tax from a purchase price.
VAT Calculator to Add or Remove VAT from Any Amount
Add VAT to a net amount or remove VAT from a gross amount.
Unit conversion calculators
Convert common length, weight, temperature, speed, volume and area measurements.
CM to Inches Calculator
Convert centimetres to inches quickly and accurately.
Inches to CM Calculator
Convert inches to centimetres quickly and accurately.
Feet to Metres Calculator
Convert feet and inches to metres with a clear formula and examples.
Metres to Feet Calculator
Convert metres to feet and inches with practical rounding.
KG to LB Converter (Kilograms to Pounds)
Convert kilograms to pounds for weight and body-weight measurements.
LB to KG Converter (Pounds to Kilograms)
Convert pounds to kilograms for weight and body-weight measurements.
Celsius to Fahrenheit Converter (°C to °F)
Convert Celsius temperatures to Fahrenheit.
Fahrenheit to Celsius Converter (°F to °C)
Convert Fahrenheit temperatures to Celsius.
Miles to KM Converter (mi to km)
Convert miles to kilometres for distance and travel estimates.
KM to Miles Converter (km to mi)
Convert kilometres to miles for distance and travel estimates.
MPH to KPH Calculator
Convert miles per hour to kilometres per hour.
KPH to MPH Calculator
Convert kilometres per hour to miles per hour.
Litres to Gallons Calculator
Convert litres to gallons for volume and fuel measurements.
Gallons to Litres Calculator
Convert gallons to litres for volume and fuel measurements.
Cups to mL Calculator
Convert US cups to millilitres for kitchen measurements.
mL to Cups Calculator
Convert millilitres to US cups for cooking and baking.
Square Feet to Square Metres Calculator
Convert square feet to square metres for area, property, and renovation tasks.
Square Metres to Square Feet Calculator
Convert square metres to square feet for area, property, and renovation tasks.
Litres per Square Metre Calculator
Estimate litres per square metre for coverage and application planning.
Date and time calculators
Calculate ages, date gaps, countdowns, working days, durations and time between dates.
Age Calculator
Calculate age from a date of birth.
Age Difference Calculator
Compare two birth dates and estimate the age gap between them.
Days Between Dates Calculator
Count the number of days between two dates.
Weeks Between Dates Calculator
Convert the gap between two dates into weeks.
Business Days Calculator
Estimate working days between two dates, excluding weekends.
Date Add Calculator
Add a number of days to a start date and find the resulting date.
Countdown Calculator
Count the remaining time until a future date.
Time Duration Calculator
Calculate duration between start and end times.
Hours Between Dates Calculator
Estimate the number of hours between two dates and times.
Due Date Calculator
Estimate a pregnancy due date from the last period date.
Ovulation Calculator
Estimate an ovulation window from cycle timing assumptions.
Health calculators
Estimate BMI, calories, hydration, protein, ideal weight, pace and other everyday health metrics.
BMI Calculator
Estimate body mass index from height and weight.
Body Surface Area Calculator
Estimate body surface area from height and weight.
Ideal Weight Calculator
Estimate ideal-weight ranges using height, sex, and frame adjustment assumptions.
Lean Body Mass Calculator
Estimate lean body mass from body weight and body-fat percentage.
Waist-to-Hip Ratio Calculator
Calculate waist-to-hip ratio from waist and hip measurements.
Water Intake Calculator
Estimate daily water intake from body weight and activity.
Protein Intake Calculator
Estimate daily protein target from body weight and goal assumptions.
Pace Calculator
Calculate pace from distance and time.
One-Rep Max Calculator
Estimate one-rep max from lifted weight and completed repetitions.
Math calculators
Use common maths tools for averages, medians, modes, ratios, statistics, slopes and geometry.
Average Calculator
Calculate the arithmetic average of a list of numbers.
Median Calculator
Find the median value from a list of numbers.
Mode Calculator
Find the most frequently occurring value in a number list.
Standard Deviation Calculator
Estimate standard deviation from a list of values.
Weighted Average Calculator
Calculate weighted average from values and weights.
Ratio Calculator
Simplify or compare two numbers as a ratio.
Slope Calculator
Calculate slope between two coordinate points.
Midpoint Calculator
Find the midpoint between two coordinate points.
GPA Calculator
Estimate GPA from grades and optional credit weights.
Square Footage Calculator
Calculate square footage from length and width.
Room Perimeter Calculator
Calculate room perimeter from length and width.
Household and construction calculators
Plan paint, concrete, tile, flooring, mulch, gravel and room measurements.
Paint Calculator
Estimate paint needed from wall area and coverage.
Concrete Calculator
Estimate concrete volume for slabs, footings, and similar projects.
Tile Calculator
Estimate tile quantity from area, tile size, and waste allowance.
Flooring Calculator
Estimate flooring quantity including waste allowance.
Mulch Calculator
Estimate mulch volume from area and depth.
Gravel Calculator
Estimate gravel volume or weight from area and depth.
Square Footage Calculator
Calculate square footage from length and width.
Room Perimeter Calculator
Calculate room perimeter from length and width.
Everyday calculators
Quick tools for common daily calculations, tips, fuel, cooking, dates and practical estimates.
Tip Calculator
Calculate tip amount, bill total, and per-person split.
Cups to mL Calculator
Convert US cups to millilitres for kitchen measurements.
mL to Cups Calculator
Convert millilitres to US cups for cooking and baking.
Time Duration Calculator
Calculate duration between start and end times.
Days Between Dates Calculator
Count the number of days between two dates.
Discount Calculator
Calculate sale price and savings after a discount.
Percentage Calculator to Find X% of Y
Find a percentage of a number, such as 15% of 200.
Sales Tax Calculator
Add or reverse sales tax from a purchase price.