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Free online calculator

Do your sums instantly and find the calculator you need for work, money, health or everyday life.

You can use your keyboard: Enter calculates, Esc clears and ⌫ deletes the last character.

History

    Your results will appear here during this visit.

    All calculators

    Maths calculators

    Scientific calculatorTrigonometry, logarithms, powers and roots.Percent of a number calculatorFind X % of any number in a second.Rule of three calculatorDirect and inverse proportions.Fraction calculatorAdd, subtract, multiply and simplify fractions.

    Finance calculators

    Mortgage calculatorMonthly repayment, interest and amortisation schedule.Loan calculatorMonthly payment, interest and APR of a loan.Compound interest calculatorFuture value with monthly contributions.VAT calculatorAdd or remove VAT from any amount.Remove VAT calculatorGet the net price from a VAT-inclusive amount.Nominal to effective rate calculatorConvert a nominal rate to an effective rate (AER) and back.Savings interest calculatorGross and net interest on a deposit.Home buying costs in SpainTaxes and fees for buying a home in Spain.

    Work calculators

    Spain net salary calculatorGross to net pay in Spain with 2026 IRPF and Social Security.Net to gross salary calculator (Spain)From the net pay you want to the gross to ask for.Spain IRPF withholding calculatorThe income tax withholding rate on your Spanish payslip.Spain payslip calculatorSimulate your Spanish payslip with every deduction.Final settlement calculator (Spain)Outstanding salary, holiday and extra payments in Spain.Spain severance pay calculatorUnfair or objective dismissal and end of contract in Spain.Spain unfair dismissal calculator33 days per year, capped at 24 months’ pay.Spain objective dismissal calculator20 days per year, capped at 12 months’ pay.End of temporary contract calculator (Spain)12 days per year when a temporary contract ends.Holiday entitlement calculator (Spain)Holiday accrued, remaining and its value.Spain unemployment benefit calculatorAmount, duration and total of Spanish unemployment benefit.Spain sick pay calculatorSick leave benefit in Spain for illness or accident.Hours and minutes calculatorAdd and subtract hours and minutes.Hours worked calculatorHours between clock-in and clock-out, minus breaks.

    Health calculators

    BMI calculatorBody mass index and healthy weight range.Calorie calculatorCalories to maintain, lose or gain weight.BMR calculatorBasal metabolic rate with Mifflin-St Jeor and Harris-Benedict.Macro calculatorGrams of protein, carbs and fat.Ideal weight calculatorIdeal weight with five classic formulas.Body fat calculatorBody fat percentage with a tape measure.Due date calculatorEstimated due date and key dates.Pregnancy calculatorPregnancy week, trimester and key dates.Ovulation calculatorOvulation day and fertile window.

    Everyday calculators

    Percentage calculatorParts, proportions and percentage change.Discount calculatorSale price and how much you save.Days between datesCalendar days, weeks and weekdays between two dates.Age calculatorExact age and days until your birthday.Grade average calculatorSimple and weighted average of your grades.Date calculatorAdd or subtract days, months and years from a date.Working days calculatorAdd and count weekdays from Monday to Friday.Trip fuel cost calculatorFuel cost of a trip and per person.Spanish university entrance grade (PAU)Access and admission grade for Spanish universities.Spanish DNI/NIE letter calculatorCheck letter of a Spanish DNI or NIE.

    Converters

    Unit converterLength, mass, area, volume, speed and temperature.Euro to peseta converterEuros to Spanish pesetas at 166.386.Peseta to euro converterPesetas, thousands and millions to euros.kW to HP converterKilowatts to horsepower (hp and PS).HP to kW converterHorsepower to kilowatts.

    A simple online calculator and more than 50 tools

    TeLoCalculo brings together an online calculator for everyday arithmetic and more than fifty specialised calculators. The basic calculator adds, subtracts, multiplies, divides and works out percentages while respecting the order of operations; if you need trigonometry, logarithms or powers, use the scientific calculator.

    Every tool runs directly in your browser: the figures you type are not sent to any server, so results appear instantly and your information stays on your device. Each calculator explains how the calculation works, includes an example and answers the most common questions.

    How to use it

    1. Type the expression with the on-screen keypad or your keyboard, for example 150 + 21 %.
    2. You will see a live preview of the result; press = or Enter to confirm it.
    3. Use the history to recall earlier calculations, or share the result with the buttons.

    Frequently asked questions

    Does the calculator follow the order of operations?

    Yes. Brackets come first, then powers, then multiplication and division, and finally addition and subtraction. So 2 + 3 × 4 gives 14, not 20.

    How do I work out a percentage?

    Type the amount, + or −, and the percentage followed by %. For example, 80 − 15 % gives 68, i.e. 80 with a 15 % discount. To find 20 % of 150, type 20 % × 150.

    Are my calculations saved?

    No. Calculations happen in your browser and the history only lasts while the page is open. We do not store or send your data.

    Can I use decimals and negative numbers?

    Yes. Type decimals with a point and change the sign of a number with the ± key.

    Are the calculators free?

    Yes, every TeLoCalculo tool is free and you do not need to register to use it.