Everyday Cost Calculators

Cost calculators for what a meal, a drive or an appliance actually costs: tips, split bills, fuel, electricity and EV charging.

Bills and cash

• Tip CalculatorThe tip calculator gives the tip, the total and the per-person share, including whether you are tipping on the tax.
• Bill SplitterThis bill splitter divides a restaurant check by what each person ordered, splits shared plates among the people who had them, and shares out the tax and tip so the totals match the receipt to the cent.
• Money CounterThe money counter adds up US bills and coins by denomination, takes off the float to give the deposit, and checks the drawer against the register for over or short.

Driving and energy

• Fuel Cost CalculatorTrip cost, MPG, and the conversion to L/100km in one fuel cost calculator. It also shows why MPG makes a 15-to-20 upgrade look smaller than it is.
• Electricity Cost CalculatorWhat an appliance costs to run, from the electricity cost calculator, and which appliances are worth the attention. It is almost never the ones people switch off.
• EV Charging Cost CalculatorEnter your car's consumption and your price per kWh, and the EV charging cost calculator gives the cost of a charge, of each mile and of a year's driving, set against a gas car.
• Carbon Footprint CalculatorEnter a year of electricity, heating fuel, driving and flights, and this carbon footprint calculator multiplies each by EPA's emission factor and adds them up in metric tons of CO2-equivalent.
• Tire Size CalculatorThe tire size calculator compares two sizes by diameter, sidewall and circumference, with the speedometer and odometer error and whether the change is inside the 3% tolerance.

Travel

• Air Miles CalculatorType two airport codes and this air miles calculator gives the shortest distance between them over the Earth's surface, in statute miles, kilometers and nautical miles, for a nonstop flight or a trip with connections.

More categories

• Math CalculatorsMath calculators that show their work: arithmetic, algebra, statistics, and a calculus calculator for derivatives and integrals, with exact answers in fractions and radicals where they exist.
• Geometry CalculatorsGeometry calculators for shapes, lines and angles, with the formula behind each answer explained.
• Chemistry Calculators, Physics and Lab ToolsChemistry calculators, physics calculators and molecular biology tools for the bench and the problem set.
• Conversion CalculatorsConversion calculators for unit conversion, number bases, Roman numerals and angles. The unit converter shows the factor it used and a conversion chart for the values around yours.
• Date and Time CalculatorsDate and time calculators for counting days, adding hours, converting time zones and reading other calendars.
• Business CalculatorsBusiness calculators for pricing a product and for the unit economics behind a company: margin, markup, break-even, ROI, CAC, LTV and churn.
• Random GeneratorsRandom generators that draw fairly, from your browser's cryptographic generator: numbers, names, teams, coin flips and dice.
• Free Online ToolsFree online tools for codes and text, run in your browser with nothing uploaded.