Voice Calculator
Speak your math equation and hear the answer instantly. This free, voice activated calculator runs in your browser, so there is no app to install and no sign-up. Tap the mic and say something like "twelve times five plus ten", the result appears on screen and is read back to you.
Tap the mic and speak an equation.
How this voice calculator works
A voice calculator (also called a voice activated calculator, voice controlled calculator, or speaking calculator) lets you do math hands-free. You say the equation, the calculator parses it with on-device speech recognition, and the answer appears on screen.
This page is also a text to speech calculator: every result is read aloud using your browser's built-in speech synthesis. Both directions of calculator speech, speech in (recognition) and speech out (synthesis), are handled locally by your browser. Nothing is uploaded to Calculory.
- Verbal calculator for moments when your hands are busy: cooking, lab work, fieldwork, or driving setup.
- Speaking calculator for low-vision users who prefer audio output. Toggle the read-aloud option in the calculator card.
- Voice command calculator for dictating equations while typing or writing in another window.
- Voice calculator app replacement with no install, no permissions beyond the microphone, and no account required.
If you searched for a calculator with voice, a calculator with speaker output, or simply "calculator speech", this page covers all of those use cases in one tool.
Voice commands you can use
The voice calculator understands plain English math phrases. Here are some example voice commands that work out of the box, no setup required.
Tip: say "plus" for addition. The word "and" is treated as part of a number, so "one hundred and twelve" means 112, not 100 + 12.
Frequently asked questions
Is this voice calculator really free?
Yes. Calculory's voice calculator is 100% free and runs entirely in your browser. No sign-up, no app install, no usage limits, and no payment required.
Is this a voice activated calculator or do I need a voice calculator app?
It is voice activated and runs in the browser. You do not need to install a voice calculator app from any app store. Just open this page, tap the microphone button, and start speaking. The same experience works on desktop and mobile.
Does the calculator read the result back aloud (text to speech)?
Yes. After every calculation, the result is spoken aloud using your browser's built-in speech synthesis, so this works as a text to speech calculator as well as a speech to text one. You can toggle the read-aloud option using the speaker icon under the microphone.
Can I use it as a verbal or speaking calculator for accessibility?
Yes. Because the page accepts spoken input and reads the result back, it works as a hands-free verbal calculator for users with motor or vision impairments. The result card also uses high-contrast colours and an accessible aria-live region so screen readers announce updates.
Which browsers support voice input?
Voice input works in Chrome, Microsoft Edge, and Safari (desktop and iOS) using the built-in Web Speech API. Firefox does not enable speech recognition by default, but the typed-input fallback on this page still works there.
Does it work on iPhone and Android?
Yes. On iPhone, open this page in Safari and grant microphone permission when prompted. On Android, use Chrome. The mic button works the same way as on desktop.
Is my voice sent to a server?
Speech is processed by your browser's speech recognition service (provided by your operating system or browser vendor). Calculory does not record, store, or transmit audio. Calculation results stay on your device.
What math operations are supported?
Addition, subtraction, multiplication, division, decimals, percentages, square roots, exponents (squared, cubed, "to the power of"), parentheses, and constants like pi. See the supported phrases list on this page for examples.
Why did it parse "and" as a connector instead of plus?
Because "one hundred and twelve" is a single number (112) in everyday English. To add two numbers, say "plus" or "add", for example "one hundred plus twelve" gives 112.
Can I type equations instead of speaking?
Yes. Every voice calculator on this page also has a text input below the mic. Type a phrase like "twelve times five plus ten" or a standard math expression like "sqrt(144)" and press Calculate.
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