Frequently Asked Questions

Voice Calculator uses built-in speech recognition technology to listen to your voice commands and perform calculations instantly. Simply tap the microphone button, speak your math problem clearly (for example, 'What is 25 plus 37?'), and Voice Calculator will calculate and display the answer. It works in any modern web browser with microphone access.

Yes, Voice Calculator is completely free to use with no hidden costs, subscriptions, or premium features. All voice calculator functionality, including speech recognition, text-to-speech results, and calculation history, is available at no charge.

Voice Calculator works on any device with a web browser and microphone, including smartphones (iPhone and Android), tablets, laptops, and desktop computers. It's compatible with Chrome, Edge, Safari, and other modern browsers that support Web Speech API. For the best experience, we recommend using Chrome or Edge.

You can use natural language voice commands like: 'What is 50 plus 25?', '100 divided by 4', '15 times 8', '75 minus 30', or '20 percent of 150'. You can also say operators directly: 'plus', 'minus', 'times', 'multiplied by', 'divided by', 'over', and 'equals'. Speak clearly and include the word 'equals' or pause after your calculation for automatic results.

Yes, Voice Calculator is designed with accessibility in mind. It features full screen reader support, keyboard navigation for all functions, voice-activated controls, audio result announcements, and high contrast display options. It's particularly helpful for users with visual impairments, mobility challenges, or anyone who needs hands-free calculation capabilities.

Voice Calculator supports basic arithmetic operations (addition, subtraction, multiplication, division), percentages, decimals, and negative numbers. While it handles most everyday calculations, it's optimized for quick, hands-free math rather than advanced scientific or engineering calculations. For complex formulas, you can manually input expressions using the on-screen buttons.

Voice Calculator uses industry-standard Web Speech API with approximately 95% accuracy in quiet environments when speaking clearly. Accuracy depends on factors like microphone quality, background noise, accent, and speaking pace. For best results, speak clearly at a normal pace in a quiet environment. You can always verify the input display before confirming your calculation.

Yes, Voice Calculator automatically saves your calculation history locally in your browser. You can review past calculations, organize them by custom categories (like Budget, Shopping, Work), and access your complete calculation log anytime. Your history is stored privately on your device and never sent to external servers.

Voice calculators offer significant advantages when your hands are busy (cooking, driving, crafting), when you have accessibility needs, or when you want faster input for long calculations. VoiceCalc is especially useful for multitasking, improves accessibility for users with disabilities, allows eyes-free operation, and speeds up complex calculations by eliminating manual input.

When you first tap the microphone button, your browser will ask for permission to use your microphone. Click 'Allow' or 'Yes' to enable voice input. If you accidentally denied access, you can enable it in your browser settings: click the lock icon in the address bar, find microphone permissions, and set it to 'Allow' for VoiceCalc.io.

Voice Calculator combines hands-free voice input with advanced features like ElevenLabs natural text-to-speech for results, customizable calculation categories for organization, complete calculation history tracking, accessibility-first design, keyboard shortcuts for power users, and multiple color themes. It's free, works offline, and requires no app installation.

Voice Calculator's basic calculator functions work offline once loaded. However, voice recognition requires an internet connection as it uses cloud-based speech processing. ElevenLabs text-to-speech also requires internet, though browser-based voice synthesis works offline. For offline use, you can still use the on-screen buttons and keyboard input.

Yes, your privacy is protected. Voice Calculator stores all calculation history locally in your browser—nothing is sent to our servers. Voice recognition uses your browser's built-in speech API, which may send audio to Google or Apple for processing (depending on your browser). We never collect, store, or sell your personal data or calculations.

Yes! Voice Calculator includes category features perfect for budgeting. You can label calculations as 'Budget', 'Shopping', 'Bills', or create custom categories. Your calculation history with categories helps you track expenses over time. While it's not a full budgeting app, it's excellent for quick expense calculations and maintaining an organized calculation log.