One calm place for every calculation

A free calculator for math, science, and everyday questions.

Scientific calculation, natural-language Smart answers, unit conversion, and graphing in one free online calculator for any modern browser.

Open web app

Download nowApple platformsComing soonAndroid

See it in action

Free web app · iPhone, iPad, and Mac app available now · Android coming soon

x² + y²24 m³15% = 360sin(30°)

Scientific calculator showing seven times eight equals fifty-six

7 × 856

Questions, made useful

Ask it in your own words.

Browse tips, units, geometry, everyday math, and science questions AskSum can work through—and the answers it returns.

Example Verified answer

Example questions AskSum can solve

tip 18% on $84

$15.12 tip · $99.12 totalSmart

what is 15% of 240?

36Smart

monthly cost of $49 for 18 months

$882.00 · 18 × $49Smart

20% off $65

$52.00 · $13 savedSmart

11 kilometres in miles

6.84 miConvert

$450 USD to EUR

≈ €416.40 · live rateConvert

72°F in Celsius

22.2°CConvert

5 kilograms in pounds

≈ 11.02 lbConvert

24 metres times 12 metres times 7 metres

2,016 m³ · box volumeSmart

area of a circle with radius 5 m

≈ 78.54 m²Smart

perimeter of a 3 by 7 rectangle

20Smart

area of a 4 by 9 rectangle

36Smart

recipe scale 1.5x for 250 g flour

375 gSmart

how many calories in 2 bananas?

≈ 210 kcalSmart

days in 3 weeks

21Smart

double a recipe that uses 3 eggs

6 eggsSmart

solve 2x + 5 = 17

x = 6Smart

atomic number of carbon

6Smart

force if mass is 10 kg and acceleration is 3 m/s²

30 NSmart

protons in oxygen

8Smart

Made for real life

From the first equation to the final check.

A focused calculator that adapts to the way you learn, build, compare, and decide.

Students

See the steps, explore visual answers, and keep past work close when revision gets busy.

Professionals

Move from scientific expressions to practical unit and currency conversions without changing tools.

Everyday problem-solvers

Ask naturally, calculate quickly, and return to useful results whenever you need them.

More than a keypad

The tools you reach for, working together.

Built around accurate calculation first, then shaped to make answers easier to understand and reuse.

Scientific, without the clutter

Functions, trigonometry, algebra, variables, and equation solving stay within one familiar workspace.

Apple

Smart explanations

Ask in natural language and receive verified answers with steps and purpose-built visuals.

Android

Conversions that keep up

Handle 17 categories, ingredients, live currency rates, and common comparisons in seconds.

Apple

See the answer

Charts, geometry, physics, and educational diagrams make abstract results easier to grasp.

History with context

Search, pin, favorite, annotate, export, and continue past calculations instead of starting over.

Five languages

Use English, Spanish, French, German, or Japanese throughout the experience.

A workspace that feels yours

Choose from five thoughtful themes, light and dark appearances, and high-contrast options.

Inside the app

Clear when it is simple. Powerful when it is not.

Move between familiar calculation, natural-language help, conversion, and organized history without losing your place.

Scientific

A clean keypad with deeper tools one tap away.

Make it yours

One calculator. Three distinct personalities.

Start with five calm color themes, then choose a calculator look that feels familiar, focused, or engineered.

Classic color themes

Calculator looks

Classic

A clean, modern workspace shaped by your chosen color theme.

Classic Scientific

Pro

Dark instrument housing, tactile keys, and a softly glowing LCD.

Minimal Alloy

Pro

Brushed metal, recessed controls, and precise orange accents.

Clear choices

Free on the web. Ad-free with Pro.

Core calculations and local history stay in your browser. An account is optional; the free web app is supported by Google banner advertising, while verified Pro access removes those ads.

Local calculator and history
Optional account and cloud sync
Google consent controls for web advertising

Read the privacy policy

Questions, answered

Good to know.

01When can I download the app?

AskSum is available now on the App Store for iPhone, iPad, and Mac. The Android listing is coming soon, and its download button will appear here when it is live.

02Is Smart available on Android?

Yes. Android and web run the same local deterministic Smart core, while Apple retains its verified native presentation and optional on-device prose.

03Does the app need an account?

No. Calculator and Smart work locally without an account. A magic-link account is optional for cloud history sync and web Pro billing.

04Does Smart send my questions to a remote AI service?

Verified calculation rules produce the answer. On supported Apple devices, optional enhanced prose uses Apple's on-device Foundation Models rather than a third-party AI account.

05How do cookies and ads work on the web app?

Essential storage keeps calculator features, security, and optional sign-in working. Free web-app pages can show Google banner ads; Google Privacy & Messaging provides consent, rejection, management, and revocation controls where required. Pro removes web-app ads.

06Which languages are supported?

English, Spanish, French, German, and Japanese are supported across the app and this website.

07Is this suitable for professional or safety-critical decisions?

It is a general-purpose calculation tool. Important financial, medical, engineering, or safety decisions should always be independently checked by a qualified professional.

A clearer way to calculate is here.

Download AskSum for iPhone, iPad, and Mac from the App Store. The official Google Play link will appear here when the Android listing is live.

Download nowApple platformsComing soonAndroid