Live basic calculator · made for phones

Calculators that feel real
in your hand.

Tap on big, thumb-friendly buttons, keep a running history tape, and save your favourite calculators for later.

Open Basic Calculator
No sign‑upWorks offline after load
1
Live now
Basic calculator with history & memory.
20+
Planned
Scientific, graphing, finance, health & more.
Basic · LiveTap to feel it

0

This is the live basic calculator—tap the keys, see your history tape and use memory just like a real desk device.

⌨

Made for keyboards & thumbs

Type with keys or tap big thumb-friendly buttons.

✓

No sign‑up, no clutter

Open, calculate, close. Your history stays on this device.

⚡

Designed for phones first

Safe-area padding, tap feedback and fast load times.

→

On the roadmap

Up next: Scientific, Loan / EMI, BMI, Graphing, Currency and more.

EarlyBuildingLaunch

Featured calculators

Start with the most popular tools, then browse everything else below.

Finance, health, school, converters and more—no sign‑up, works in your browser.

FeaturedBasicLoan / EMIBMILength

Everyday

Quick daily math and tape-style flows.

Basic Calculator

Live

Home, office & students. Real keypad + history + memory.

Open

Printing Calculator

Planned

Calculator tape style for bookkeeping and receipts.

Open

Math & Science

From scientific keys to graphing and matrices.

Scientific Calculator

Planned

Trigonometry, powers, roots and more.

Open

Graphing Calculator

Planned

Plot functions and explore curves visually.

Open

Programmable Calculator

Planned

Reusable programs and advanced operations.

Open

Length Converter

Planned

Meters, feet, inches, kilometers and more.

Open

Weight Converter

Planned

Kilograms, pounds, ounces and more.

Open

Temperature Converter

Planned

Celsius, Fahrenheit and Kelvin.

Open

Area Converter

Planned

Square meters, feet, acres and more.

Open

Volume Converter

Planned

Liters, milliliters, cups, gallons and more.

Open

Speed Converter

Planned

km/h, mph, m/s and more.

Open

Fraction & Percentage

Planned

Convert fractions, decimals and percentages.

Open

Matrix Calculator

Planned

Determinant, inverse and basic matrix operations.

Open

Money & Business

Loans, EMIs, interest, discounts and tax.

Financial Calculator

Planned

Loans, EMIs, interest, savings and cashflows.

Open

Loan / EMI

Planned

Monthly payments, interest and payoff schedule.

Open

Compound Interest

Planned

See how your savings grow over time.

Open

Mortgage Payoff

Planned

Estimate payoff dates and extra payment impact.

Open

Currency Converter

Planned

Convert between currencies with live rates.

Open

Discount Calculator

Planned

Sale price and savings for any discount.

Open

Tax / VAT

Planned

Add or remove tax/VAT from a price.

Open

Life & Utility

Dates, time, fuel, recipes and more.

Tip & Split Bill

Planned

Tip amount and per-person total.

Open

Age Calculator

Planned

Exact age in years, months and days.

Open

Date Difference

Planned

Days between two dates.

Open

Time Duration

Planned

Add or subtract hours and minutes.

Open

Fuel Cost & Mileage

Planned

Trip fuel cost and mileage estimates.

Open

Recipe Scaler

Planned

Scale ingredient quantities up or down.

Open

Health

BMI, calories, heart rate and hydration.

BMI Calculator

Planned

Body Mass Index with category ranges.

Open

BMR & Calories

Planned

Basal metabolic rate and daily calories.

Open

Target Heart Rate

Planned

Heart rate zones by age.

Open

Water Intake

Planned

Suggested daily water goal.

Open

School & Exams

Grades, GPA and exam targets.

GPA Calculator

Planned

Grade Point Average for courses and credits.

Open

Grade Needed

Planned

Score required on the final to hit a target.

Open

Marks & Percentage

Planned

Convert marks to percentages and vice versa.

Open

For Developers

Bases, IP ranges and timestamps.

Base Converter

Planned

Binary, decimal, hex and more.

Open

IP Subnet Calculator

Planned

CIDR ranges, masks and host counts.

Open

Unix Time Converter

Planned

Unix timestamp to date and back.

Open

What you can calculate with Calculators.digital

Use these free online calculators for everyday math, finances, health, school and quick unit conversions. Open the basic calculator for four‑function work with history and memory, or switch to specialised calculators for loans, BMI, GPA, dates, percentages and more as they launch.

Every calculator is designed to feel like a real device, with big thumb‑friendly buttons, keyboard shortcuts on desktop and clear results you can reuse. Your history stays on this device—there is no account, no emails and no clutter.

Frequently asked questions about these calculators

Are these calculators free to use?

Yes. All calculators on Calculators.digital are free to use in your browser, with no sign‑up or subscription required.

Do you store my calculations or personal data?

No. Calculation history is kept locally in your browser so you can reuse it later, but it is not sent to a server or tied to an account.

Can I use these calculators on my phone?

Yes. The layouts are designed for phones first, with safe‑area padding, large tap targets and offline support after the first load.

What kinds of calculators are planned?

Alongside the basic, scientific and printing calculators, the roadmap includes finance (loan / EMI, mortgage, discounts, tax), health (BMI, BMR, water), converters (length, area, currency) and student tools (GPA, grade needed and more).