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Everyday Calculators

Baking conversion, tipping, ages and countdowns — the everyday maths people look up every week

63 toolsNo signupRuns in your browser

Cups to Grams Converter

Convert cups to grams for flour, sugar, butter and more, using each ingredient's real density. Free, no signup, works on your phone.

Tip Calculator

Work out the tip and split the bill in seconds. Pick a percentage, set the number of people, and get the exact per-person total. Free.

Dog Age Calculator

Convert dog or cat years into human years using the size-based formula, plus life stage and typical lifespan. Free, no signup.

Days Until Christmas Countdown

A live countdown to Christmas, New Year, Halloween, Thanksgiving or any date you pick — updating every second. Free.

Time Zone Converter

Find out what time it is in another city, and how many hours ahead or behind you are. Daylight saving handled automatically. Free.

Age Calculator

Work out your exact age in years, months and days, plus total days lived and how long until your next birthday. Free.

Percentage Calculator

Work out a percentage of a number, the percentage change between two values, or what percentage one number is of another. Free.

Gas Cost Calculator

Work out what a road trip will cost in fuel from the distance, your fuel economy and the current price per gallon. Free.

Celsius to Fahrenheit Converter

Convert between Celsius, Fahrenheit and Kelvin instantly, with all three scales shown at once. Free, no signup.

Cooking Measurement Converter

Convert between cups, tablespoons, teaspoons, millilitres, fluid ounces and gallons for any recipe. Free, no signup.

What Day of the Week Was It

Find out which weekday any date falls on, plus its day number and week number in the year. Free, no signup.

Date Difference Calculator

Count the days, weeks and months between two dates, including an estimate of business days. Free, nothing is uploaded.

Date Calculator — Add or Subtract Days

Add or subtract days, weeks, months or years from any date to find the resulting date. Free, no signup.

Hours Calculator

Work out how many hours you worked from a start and end time, with an unpaid break deducted. Free, no signup.

Dice Roller

Roll any number of dice with any number of sides — d6, d20, d100 — and see the total and individual results. Free.

Convert Comma Separated List to Lines

Split a comma-separated list into one item per line, ready to paste into a spreadsheet or form. Free, no signup.

Convert Lines to Comma Separated

Join a column of values into one comma-separated line for spreadsheets, forms and search boxes. Free, no signup.

Reverse Text Generator

Flip text backwards character by character — fun for puzzles, captions and prank messages. Free, no signup.

Reverse Line Order

Flip a list upside down so the last line becomes the first. Handy for logs and changelogs. Free, no signup.

Remove Extra Spaces Between Words

Collapse runs of spaces and tabs down to a single space, so pasted text reads cleanly. Free, runs in your browser.

Remove Punctuation From Text

Strip commas, periods, quotes and brackets out of a block of text, leaving only words and numbers. Free.

Remove Line Breaks

Join multiple lines into one continuous paragraph by removing every line break. Free, runs offline in your browser.

Length Converter

Convert meters, centimeters, inches, feet, miles — any pair of common length units. Free, runs offline.

Weight Converter

Convert kilograms, pounds, ounces, stones — every common weight unit. Quick reference for cooking and shipping.

Volume Converter

Liters, cups, tablespoons, gallons — pick any two and convert. Cup here is the US legal cup (240 ml).

Area Converter

Square meters, acres, hectares and more. Handy for real-estate listings, gardens, and land area planning.

Speed Converter

km/h, mph, m/s, knots — switch between any of them. Useful for running paces, driving speeds and sailing.

Fuel Economy Converter

Between MPG (US/UK), L/100 km, and km/L — pick the same car in a different unit system.

Energy Converter

Calories, kilojoules, BTU, kWh — any pair. Useful when comparing appliance power use against food energy.

Pressure Converter

PSI, bar, kPa, atm, mmHg — pick any pair. Tire shops quote PSI, weather charts use hPa, vacuum needs Torr.

Electricity Cost Calculator

How much does running an appliance cost per day, month or year. Set wattage, hours and your electricity rate.

Commute Cost Calculator

Yearly fuel cost of getting to and from work, based on round-trip distance and how often you drive.

Subscription Cost Calculator

Sticker shock for streaming, music and software subs. What you have actually paid over a year or five.

Coffee Cost Calculator

Annual cost of café coffee vs brewing your own. Numbers tend to shock — use it to decide if a home espresso is worth it.

Smoking Cost Calculator

How much you will have spent on cigarettes and vapes over years — and what that money could have grown into.

Streaming Cost Calculator

How much your streaming, music and audio book subscriptions cost combined — and what you actually watch.

Party Budget Calculator

Estimate food, drink, decor and venue costs for a party by guest count and per-person budget.

Vacation Cost Calculator

Estimate trip cost: lodging, food, local transport and an extras cushion. Plan before you book.

Gift Split Calculator

Split the cost of a group gift equally and get the per-person amount, including remaining cents.

Paint Calculator

How many litres of paint to cover a wall, accounting for two coats and the typical 10 m²/L spread rate.

Tile Calculator

Tiles needed for a given floor area, with the standard 10% waste buffer for cuts and breakage.

Flooring Calculator

Square meters of laminate or hardwood needed, including a waste percentage for plank end cuts.

Concrete Calculator

Cubic meters of concrete for a slab, plus the typical 10% over-order to avoid a short pour.

Moving Boxes Calculator

How many medium and large boxes you will need to pack up by home size and whether you have a full kitchen.

Parking Cost Calculator

Yearly cost of paid parking for work, downtown errands, or airport — useful for comparing transit pass prices.

Unit Price Calculator

Find the true per-gram or per-100ml cost of two products to compare bulk vs small-pack pricing.

Fuel Cost Trip Calculator

Total fuel cost for a road trip, based on distance, your car efficiency and current fuel price.

Age in Days Calculator

Total days you have been alive — useful for milestones and for the standard "10,000 days alive" check.

Age in Months Calculator

See exactly how many complete months (and leftover days) you have lived, useful for babies and toddlers.

Days in a Month

How many days in any month, with leap-year handling for February. Plan billing cycles and rotations.

Pool Volume Calculator

Litres or gallons held by a rectangular, round or oval pool — needs the average depth, since pools usually slope.

Aquarium Volume Calculator

How many litres fit in a rectangular, cube or cylindrical fish tank. Subtract substrate for the real "water" volume.

BBQ Meat Calculator

Pounds of meat to buy for a cookout by adult and kid count and appetite. Includes chicken, beef and pork options.

Drink Calculator

Drinks per person for an event by hours and style — water, soda, beer, wine, coffee. Keep guests hydrated.

Concrete Bag Calculator

Bags of premixed concrete needed to fill a given volume, in 40, 60 or 80 lb bag sizes.

Shower Cost Calculator

What a single shower costs in water and the energy to heat it. Try cutting your shower by 2 minutes and watch the number drop.

Pizza Slices Calculator

How many pizzas to order for the group, by slices per person and pizza size. Round up for hungry eaters.