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Calculators

Free Online Calculators

Quick, accurate answers for money, health, dates and school, with no sign-up.

🧮Percentage CalculatorWork out percentages three ways — instantly, free, and right in your browser.🧮Scientific CalculatorA full scientific calculator in your browser — trig, logs, powers and roots, no download needed.🧮BMI CalculatorEnter your height and weight to see your BMI and WHO category instantly — metric or imperial.🧮Age CalculatorFind an exact age in years, months and days from any date of birth — instantly.🧮Date CalculatorCount days between two dates, or add and subtract time from any date — no mental calendar gymnastics.🧮Time CalculatorAdd and subtract hours, minutes and seconds without base-60 headaches.🧮Hours CalculatorClock in, clock out — see exactly how many hours that shift was, break deducted.🧮Mortgage CalculatorEstimate your monthly mortgage payment and lifetime interest in seconds — free and private.🧮Loan CalculatorSee what any loan really costs — monthly payment plus total interest, before you sign anything.🧮Compound Interest CalculatorWatch interest earn interest — project how a balance grows over years of compounding.🧮Calorie CalculatorEstimate how many calories you burn per day — and what to eat to maintain, lose, or gain.🧮BMR CalculatorFind out how many calories your body burns doing absolutely nothing.🧮Body Fat CalculatorEstimate your body fat percentage with a tape measure — the US Navy circumference method.🧮Pregnancy Due Date CalculatorEstimate your baby's due date from the first day of your last period — with cycle adjustment.🧮GPA CalculatorTurn letter grades and credit hours into your GPA on the 4.0 scale — instantly.🧮Grade CalculatorCombine weighted assignments into your course grade — and see what you need on the final.🧮Fraction CalculatorDo fraction arithmetic the easy way — common denominators and simplification handled for you.🧮Average CalculatorType or paste a list of numbers and get the average instantly — with the sum and count shown.🧮Discount CalculatorEnter a price and a percent off — see the sale price and your savings before you reach the till.🧮VAT CalculatorAdd VAT to a net price or strip it out of a gross total — at any rate, instantly.🧮VAT Calculator UKWork out UK VAT at 20%, 5% or 0% — adding it on or taking it back out.🧮VAT Calculator IrelandIreland's four VAT bands — 23%, 13.5%, 9% and 0% — added on or taken back out.🧮VAT Calculator GermanyMehrwertsteuer made simple — 19% standard, 7% reduced, added on or stripped out.🧮VAT Calculator FranceTVA in both directions — 20%, 10%, 5.5% and 2.1%, added or extracted instantly.🧮VAT Calculator SpainIVA at 21%, 10% or 4% — add it to a base imponible or strip it from a total.🧮VAT Calculator PortugalWork out Portuguese IVA at 23%, 13% or 6% — and remember Madeira and the Azores are different.🧮VAT Calculator NetherlandsBTW both ways — 21% hoog tarief, 9% laag tarief, and 0% for qualifying exports.🧮GST Calculator IndiaAdd or remove GST at 5%, 12%, 18% or 28% — and see the CGST/SGST split worked out for you.🧮VAT Calculator UAEAdd 5% VAT to a net price or pull it out of a dirham total — both directions, instantly.🧮VAT Calculator Saudi ArabiaWork with the Kingdom's 15% rate — add it to a riyal price or strip it back out.🧮GST Calculator AustraliaAdd 10% GST, or divide by 11 to pull the GST out of a GST-inclusive price.🧮GST Calculator New ZealandAdd 15% GST to a price, or multiply by 3 and divide by 23 to pull it back out.🧮GST & HST Calculator CanadaAdd or remove GST, HST, PST or QST — set the rate for the province you are billing.🧮VAT Calculator South AfricaAdd 15% VAT to a price excluding VAT, or strip it out of a VAT-inclusive total.🧮VAT Calculator NigeriaWork out 7.5% Nigerian VAT in either direction — on a net figure or a VAT-inclusive one.🧮VAT Calculator KenyaAdd 16% VAT or work it back out of a VAT-inclusive figure, preset for Kenyan rates.🧮VAT Calculator PhilippinesAdd 12% VAT to a net amount or extract it from a VAT-inclusive price, Philippine rates preset.🧮GST Calculator SingaporeWork with Singapore's 9% rate — add GST to a price or take it out of an inclusive total.🧮VAT Calculator TurkeyAdd or strip Turkish KDV at 20%, 10% or 1% — the calculator opens ready for Türkiye.🧮IVA Calculator MexicoCalculate 16% IVA — or the 8% border rate — forwards or backwards from any peso figure.🧮VAT Calculator IndonesiaAdd or remove Indonesian PPN at the 11% effective rate — with a straight answer on the 12% question.🧮VAT Calculator RussiaAdd or extract Russian НДС at 20%, 10% or 0% — including the 20/120 settlement fraction.🧮Consumption Tax Calculator JapanAdd or remove Japanese consumption tax at 10% or 8% — including the eat-in versus takeaway rule.🧮VAT Calculator ChinaAdd or remove Chinese VAT at 13%, 9% or 6% — and see where small-scale taxpayers differ.🧮Tip CalculatorWork out the tip and split the bill per person — before the table gets awkward.🧮Salary CalculatorConvert pay between hourly, weekly, monthly and annual — and compare offers on equal terms.

These free online calculators answer the questions people actually type into search: what is 15% of a number (percentage calculator), what is my BMI, how old am I exactly (age calculator), what will a mortgage or loan really cost per month, and how fast does compound interest grow savings. Health tools include a calorie calculator, BMR and body fat calculators and a pregnancy due date estimator; students get GPA, grade, fraction and average calculators; and for daily life there are discount, VAT, tip and salary calculators plus date, time and hours tools.

Each calculator shows its result instantly as you type, with the working explained so you can trust the number rather than take it on faith. Everything runs in your browser: free, no account, no data sent anywhere, which matters when the inputs are your salary, your weight or your due date.

Frequently asked questions

Are these calculators free to use?

Yes, every calculator is free with no sign-up, no limits and no paywalled results.

Is my data private? Some inputs are personal.

Yes. Calculations run entirely in your browser, so figures like salary, weight or loan amounts are never transmitted or stored anywhere.

Do they work on phones?

Yes. All calculators are built for touch screens and work in any mobile browser on iPhone or Android.

How accurate are the health calculators?

BMI, BMR, calorie and due date results use the standard published formulas, and each page states its formula and its limits. They are good estimates for planning, not medical advice; your doctor's assessment always wins.

Can I rely on the loan and mortgage results?

The math is the standard amortization formula lenders use, so the monthly figure is accurate for the rate and term you enter. Real offers add fees and rate changes, so treat results as a solid baseline for comparison.

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