Calculo: Equation Calculator

Now smarter: ask Calculo a question in plain language, get instant autocomplete as you type, and convert across 213 units. Math that reads like writing.

Calculo is a smarter way to calculate.

Instead of punching buttons, you type. Math, notes, and answers — all on one screen, in plain language. Now with AI built in.

Type 100 USD to EUR and get today's live exchange rate. Type x = 5 and use x in every line that follows. Type 15 kg to lbs and convert instantly. Calculo reads what you write and evaluates it — line by line, as you type.

WHAT YOU CAN DO

Math that reads like writing Type expressions naturally — 2 + 3, sqrt(144), 2^10 — and see results appear instantly, right beside your text.

Ask Calculo — your built-in AI Not sure how to write it? Just ask. Type a question in plain English — "20% tip on 84.50" or "how many grams in 3 cups of flour" — and Calculo works it out, right on the canvas.

Smart autocomplete Calculo predicts what you're typing and finishes the line for you — units, currencies, functions, variable names. Accept the suggestion and keep moving.

Unit conversion — 213 units Weight, length, temperature, volume, speed, data, duration, angles, and more. Just write 5 miles to km or 98.6°F to celsius. Units combine and cancel, too — write 9.81 m/s^2 * 70 kg and get the force in newtons.

Real-time currency conversion 180+ currencies with live rates. Convert with symbols, names, or ISO codes — $500 to ¥, 420 EUR to GBP, or 100 rubles to usd.

Variables Store values and reference them by name. Write tax = 0.2, then price + price * tax — Calculo handles the rest. Use natural, multi-word names like monthly rent.

Templates Build reusable calculation sheets with editable inputs and live outputs. Tap Play, fill in the numbers, get the answer. Perfect for recurring tasks: VAT, mortgage, tip splits, unit costs.

Graphs Visualize arrays as line graphs directly on the canvas. Define a range, write an expression, see the curve.

Organized notes Create multiple notes, organize them into folders, and search across everything. Your calculation history lives where you left it.

FREE — NO REGISTRATION REQUIRED Download and start calculating immediately. No account needed.

Notepad calculator with inline results Ask Calculo AI Smart autocomplete Unit conversion — 213 units Real-time currency conversion — 180+ currencies Variables and natural language input A single saved note

PREMIUM — UNLOCK EVERYTHING

Unlimited notes — no cap, ever Templates — build and run reusable calculation sheets iCloud sync — seamlessly across iPhone, iPad, and Mac Face ID lock — protect sensitive notes with biometric security Custom color themes — personalize syntax highlighting to your taste

Try Premium free for 7 days. Cancel anytime.

WORKS ON iPhone · iPad · Mac Home screen widget included.

Subscription info Premium is available as a monthly or annual subscription. Payment is charged to your Apple ID at confirmation. Your subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Account Settings. Any unused portion of a free trial is forfeited upon purchase. Privacy Policy: https://calculo.tech/privacy_policy Terms of Service: https://calculo.tech/terms_of_use