Talking Calculator Online — a Free Calculator That Speaks Your Answers

“Talking calculator” has meant a physical device for decades: a chunky handheld with oversized keys and a speaker that announces each digit as you press it, then reads the total. Those are still made, and still the right answer for someone who wants tactile keys and no screen at all.

On the web the same job is done by two browser features instead of a speaker chip: speech synthesis reads the result out loud, and speech recognition optionally lets you say the sum. Nothing is installed, so the page works on a school Chromebook, a library PC, an Android phone and a Mac.

The voice is on. Tap the microphone and speak, or type into the field — either way the result is spoken as soon as it is worked out. Every calculation happens in your browser; nothing is uploaded.

These all work. Say them as written, or type them — spelled-out numbers parse as readily as digits:

• “35 times 12”420
• “20% of 80”16
• “1250 divided by 4 plus 18”330.5
• “fifteen percent of eighty-five”12.75
• “square root of 169”13
• “seven squared”49
• “half of eighty”40
• “two thousand five hundred minus five hundred”2,000
• “129.99 minus 20% of 129.99”103.992
• “2 to the power of 10”1,024

The same calculator sits on the home page with the voice off, and a fuller list of what the parser understands is on the voice math solver page.

Both produce speech, but they are different tools, and it is worth knowing which one is talking to you.

• Your screen reader announces the page — heading, microphone button, text field, and the result once it appears as text — whether or not this page's own voice is on.
• The read-aloud switch uses the browser's speech synthesis to say the answer, and only the answer. It is a plain button with aria-pressed, so VoiceOver, TalkBack, NVDA and JAWS all report whether it is on.
• If you already use a screen reader, you will usually want the switch off — otherwise two voices speak the result one after the other. The page remembers that choice.
• The result stays ordinary text, with the expression that produced it above the answer, so 1250 ÷ 4 + 18 = 330.5 can be re-read, magnified or copied rather than only heard.

• Learning the operation, not the keypad. A child who can say “twelve times twelve” but cannot yet find the × key practises arithmetic rather than interface. Hearing “144” closes the loop out loud.
• Access arrangements. Where a student has a specific learning difficulty — dyslexia, dyscalculia, or a DSA/SpLD assessment — a calculator that reads results back is a standard accommodation for number transposition.
• Nothing to install, nothing to log into. School devices are locked down and shared. A page is allowed where an app is not, and there is no account to create for a class of thirty.
• It speaks the room's language. The voice follows the site language, so an Italian class gets an Italian voice on /it/talking-calculator and a Spanish one on /es/talking-calculator.

For homework phrased as a sentence — “if I buy 3 items at $12.99 with 8% tax, what's my total?” — the browser calculator will say it cannot help. That is the job of the iPhone app, which sends the transcribed question to an AI model and shows the working.

VoiceCalc is a free iOS app for iPhone and iPad, iOS 16.0 or later, from SmashMelon LLC. It is a voice-input calculator: you speak a problem in plain language, Apple's speech recognition transcribes it, and an AI model solves it, showing the steps for multi-step questions. It keeps a history, and follow-ups work.

To hear an answer on iPhone you use iOS's own speech features rather than something inside the app: VoiceOver reads whatever is focused, and Speak Screen (Settings → Accessibility → Spoken Content) reads a whole screen on a two-finger swipe down. If what you want is specifically a calculator that talks back on its own, the web calculator above is the one that does it.

• Reading aloud uses the browser's speech synthesis, which current versions of Chrome, Edge, Safari and Firefox all provide. The switch appears only when the browser actually exposes it, so you never get a control that does nothing.
• Speaking to it uses speech recognition, which is narrower: Chrome, Edge and Safari. Elsewhere the microphone is disabled, the typed field still works, and the answer is still read aloud.
• Which voice you hear is whichever voice your device has for the page's language — the page asks by BCP-47 code and takes what it is given. With no voice for that language, the device substitutes another or says nothing.
• What it solves is arithmetic: the four operations, parentheses, decimals, percentages, powers and square roots. Word problems, unit and currency conversion and time-zone arithmetic are not handled here — see the comparison with Google Assistant.
• Privacy. The arithmetic and the speech synthesis run in your browser. Speech recognition is handled by the browser's own service. Details are in the privacy policy.