All the calculators you need, in one place.
Choose a category or type what you want to calculate. RestinCal currently includes 56 calculators, with more on the way. If you would like to suggest a calculator, send your idea through the Contact page.
56 calculators
Calorie calculator
Estimate energy needs and explore nutrition in RestinCal's original, comprehensive calorie-calculator experience.
Business and entrepreneurship
for initial business calculations · 10 calculators
Advertising cost per customer calculator
Divide campaign advertising spend by the number of customers acquired.
Open calculatorBillable hourly rate target calculator
Calculate an hourly rate designed to cover salary, employment costs, overhead and a profit target.
Open calculatorCommission calculator
Calculate sales commission and total earnings with an optional base salary.
Open calculatorCustomer acquisition cost calculator
Calculate the combined marketing, sales and tool cost for each new customer.
Open calculatorEmployee total cost calculator
Estimate monthly and annual employee cost from gross salary, employer costs and benefits.
Open calculatorEntrepreneur income target calculator
Estimate the monthly billing required to cover business costs, reserves and your income target.
Open calculatorFreelancer hourly rate calculator
Estimate a billable hourly rate from your income target, business costs, reserves and billable hours.
Open calculatorGross margin calculator
Calculate revenue minus variable costs and the gross margin percentage.
Open calculatorProduct profitability calculator
Estimate unit margin, total profit and profit percentage from price and costs.
Open calculatorProject profitability calculator
Compare project income with materials, working hours and other direct costs.
Open calculatorDate, time and work
for understanding dates and workloads · 3 calculators
Age in days, weeks and months calculator
Convert the time between a birth date and comparison date into days, weeks, months and years.
Open calculatorDays until a date calculator
Count how many calendar days remain until a date or have passed since it.
Open calculatorDeadline calculator
Estimate the workdays and calendar time needed to finish the remaining workload.
Open calculatorDigital technology
for common technical calculations · 4 calculators
Battery runtime calculator
Estimate how long a battery can power a selected load using capacity and efficiency.
Open calculatorDPI print size calculator
Check print resolution using image pixels and planned print size.
Open calculatorMixing ratio calculator
Divide a total amount into two parts according to a selected ratio.
Open calculatorWatts, volts and amps calculator
Solve DC power, voltage or current using two known values.
Open calculatorFamily, pets and everyday life
for understanding shared everyday costs · 3 calculators
Birthday party cost per guest calculator
Add venue, food, cake, decorations and other costs, then divide by guest count.
Open calculatorFamily food budget per person calculator
Divide a household food budget into per-person and per-day targets.
Open calculatorMonthly pet food cost calculator
Estimate monthly food quantity and cost for one or more pets.
Open calculatorFood and kitchen
for practical kitchen conversions · 5 calculators
Cooked pasta weight conversion calculator
Convert pasta from dry to cooked weight or estimate dry weight from cooked pasta.
Open calculatorCooked rice weight conversion calculator
Convert rice from dry to cooked weight or estimate dry weight from cooked rice.
Open calculatorFan and conventional oven temperature calculator
Convert a recipe temperature between conventional and fan-assisted ovens.
Open calculatorMeat cooking loss estimate calculator
Estimate cooked meat weight or the raw amount required using a yield factor.
Open calculatorRaw and cooked weight conversion calculator
Convert raw weight to cooked weight or estimate the raw amount required.
Open calculatorHousing and property
for comparing housing prices · 5 calculators
Electricity, water and internet cost split calculator
Divide household electricity, water and internet bills equally between payers.
Open calculatorHome price per square metre calculator
Calculate a comparable price per square metre from a property price.
Open calculatorHousing cost per person calculator
Divide rent or maintenance charges and other monthly housing costs between residents.
Open calculatorRent per square metre calculator
Convert monthly rent into rent per square metre for easier comparison.
Open calculatorRoommate cost split calculator
Split shared monthly costs and include a personal extra cost for one resident.
Open calculatorMoney and goals
for planning personal savings goals · 1 calculator
Sports and exercise
to support training plans · 5 calculators
1RM maximum strength estimate calculator
Estimate your one-repetition maximum from the weight and repetitions completed.
Open calculatorMarathon pace calculator
Convert a marathon target time into pace per kilometre and estimated split times.
Open calculatorTotal number of sets calculator
Calculate all working sets in a programme per workout, week and selected period.
Open calculatorTraining volume calculator
Calculate simple training tonnage from sets, repetitions and weight.
Open calculatorTraining weight calculator
Calculate a percentage of your one-repetition maximum and round it to available plates.
Open calculatorTravel
for planning travel time and spending · 6 calculators
Currency converter calculator
Convert an amount using an exchange rate you provide and include an optional exchange fee.
Open calculatorDaily budget calculator
Divide available spending money across days after known fixed costs.
Open calculatorFlight carbon footprint estimate calculator
Estimate flight emissions from distance, flight legs, passengers and an emission factor.
Open calculatorHoliday money sufficiency calculator
Check how many holiday days your money may cover after fixed costs.
Open calculatorTime difference calculator
Convert a clock time between two UTC offsets that you select.
Open calculatorTravel budget calculator
Combine transport, accommodation, food, activities and other costs into one travel budget.
Open calculatorVehicles
for comparing journeys, fuel use and vehicle costs · 14 calculators
Arrival time estimate calculator
Estimate arrival time from departure, distance, average speed and stops.
Open calculatorAverage speed calculator
Calculate average speed from distance travelled and total journey time.
Open calculatorCar powertrain choice calculator
Compare annual energy costs for petrol, diesel and electric cars at the same mileage.
Open calculatorDistance–speed–time calculator
Solve distance, average speed or travel time using two known values.
Open calculatorFuel price change impact calculator
Calculate how a change in fuel price affects the cost of a selected journey.
Open calculatorJourney fuel cost calculator
Calculate fuel quantity and cost from distance, average consumption and fuel price.
Open calculatorL/100 km ↔ km/L conversion calculator
Convert fuel consumption between litres per 100 kilometres and kilometres per litre.
Open calculatorL/100 km ↔ MPG conversion calculator
Convert consumption between L/100 km and US or UK MPG.
Open calculatorParking fine vs. parking fee calculator
Compare the cost of legal parking with a parking penalty without estimating enforcement probability.
Open calculatorPublic transport vs. car calculator
Compare estimated public transport and personal car journey costs over a selected period.
Open calculatorRequired fuel amount calculator
Calculate fuel required for a journey with an optional reserve.
Open calculatorRound-trip calculator
Calculate total round-trip distance, fuel quantity and fuel cost.
Open calculatorTyre sidewall height calculator
Calculate tyre sidewall height and estimate the complete tyre diameter.
Open calculatorWheel offset change calculator
Estimate how an equal-width wheel moves when ET offset or spacer thickness changes.
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Your browser calculates; the cloud does not
The values entered into these calculators are not sent to RestinCal's database. Optional favourites and remembered values are stored only in your browser.