Calculators
Percentages, finance, health, dates and everyday math — computed instantly in your browser.
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Percentage Calculator
Calculate percentages, percentage of a number, and percentage change.
Discount Calculator
Calculate the final price, savings and percentage off for any discount.
Loan Calculator
Estimate monthly payments, total interest and total cost of a loan.
Age Calculator
Calculate exact age in years, months and days from a birth date.
BMI Calculator
Calculate your Body Mass Index and see which category you fall into.
Tip Calculator
Split the bill and calculate the tip per person in seconds.
Percentage Change Calculator
Calculate the percentage increase or decrease between two values.
Calorie (BMR) Calculator
Estimate your daily calorie needs using the Mifflin-St Jeor equation.
VAT & Sales Tax Calculator
Add or remove VAT / sales tax and see the net, tax and gross amounts.
Grade Calculator
Turn a score out of a total into a percentage and letter grade.
Simple Interest Calculator
Calculate simple interest and the final amount for a principal over time.
Final Grade Calculator
Find the score you need on your final exam to reach a target grade.
Average Calculator
Calculate mean, median, mode, range, sum and count from a list of numbers.
Water Intake Calculator
Estimate how much water you should drink per day based on your weight.
Running Pace Calculator
Calculate your running pace, speed and finish time.
Ratio Calculator
Simplify ratios and solve for a missing value in a proportion.
Fraction to Decimal Converter
Convert a fraction to a decimal and a percentage.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two numbers.
Gas Trip Cost Calculator
Estimate the fuel cost of a trip.
Electricity Cost Calculator
Calculate the running cost of an appliance.
Paint Calculator
Estimate how much paint you need for a room.
Tile Calculator
Work out how many tiles you need for a floor or wall.
Concrete Calculator
Calculate the volume of concrete for a slab.
Recipe Scaler
Scale a recipe up or down and get the multiplier.
Fuel Cost Calculator (metric)
Estimate fuel cost using L/100km.
Reverse Tip Calculator
Work out the tip percentage from the total you paid.
Rent Affordability Calculator
See how much rent you can comfortably afford.
Freelance Hourly Rate Calculator
Find the hourly rate you need to hit an income goal.
Discount Percentage From Prices
Find the discount percentage from an original and sale price.
Wallpaper Calculator
Estimate how many rolls of wallpaper you need.
Carpet Cost Calculator
Estimate the cost to carpet a room.
Overtime Pay Calculator
Calculate overtime pay at time-and-a-half or double time.
Body Surface Area Calculator
Estimate body surface area (Mosteller formula).
Square Footage Calculator
Calculate the area of a space in square feet and metres.
Pizza Calculator
Figure out how many pizzas to order for a group.
Gas Money Split Calculator
Split fuel costs for a road trip.
Mulch Calculator
Estimate how much mulch you need to cover an area.
Grass Seed Calculator
Estimate grass seed for a lawn.
Roof Pitch Calculator
Convert roof rise and run into pitch and angle.
Wheelchair Ramp Calculator
Find the ramp length needed for a given height.
Stair Calculator
Calculate the number of steps for a staircase.
Aquarium Volume Calculator
Calculate the water volume of a fish tank.
Pool Volume Calculator
Estimate the water volume of a rectangular pool.
BTU Calculator (Room AC/Heating)
Estimate the BTUs needed to heat or cool a room.
TV Size & Viewing Distance
Find the ideal viewing distance for a TV size.
Roast Cooking Time Calculator
Estimate cooking time by weight for a roast.
Gravel Calculator
Estimate the gravel needed to cover an area.
Topsoil Calculator
Estimate topsoil needed for a garden bed.
Fence Post Calculator
Estimate the posts needed for a fence.
Board Feet Calculator
Calculate board feet for lumber.
Deck Boards Calculator
Estimate the deck boards needed for a deck.
Coffee-to-Water Ratio Calculator
Get the perfect coffee-to-water ratio.
Solar Panel Calculator
Estimate the number of solar panels for your usage.
EV Charging Time Calculator
Estimate how long an EV takes to charge.
Sod Calculator
Estimate how much sod you need for a lawn.
Firewood Cord Calculator
Calculate how many cords of firewood a stack holds.
Paint Cost Calculator
Estimate the cost to paint a room.
Water Usage Cost Calculator
Estimate the cost of water usage.
Dog Food Calculator
Estimate daily dog food from body weight.
Curtain Fabric Calculator
Estimate the fabric width needed for curtains.
Turkey Thaw Time Calculator
Find how long a turkey takes to thaw in the fridge.
Holiday Lights Calculator
Estimate string lights and power for a display.
Gift Budget Splitter
Split a group gift evenly.
Lawn Mowing Time Calculator
Estimate how long it takes to mow a lawn.