Calculate A/B test significance between two variants. Compare conversion rates with visitor and conversion data for each variant.
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Computes VAT-inclusive and VAT-exclusive amounts for EU member-state rates (standard and reduced) with country-specific rules for digital services.
Calculate BMI for children with age and gender considerations. Track childhood growth and weight status.
Computes revenue per mille (RPM) — the earnings creators and publishers make per 1,000 views or impressions. Includes platform presets for YouTube, Twitch, Facebook, Instagram, TikTok, Twitter, and LinkedIn with average rates, plus CPM calculation for advertisers.
Bidirectional YAML to JSON and JSON to YAML conversion with auto-format detection and real-time preview. Perfect for configuration files, API payloads, and data migration.
A/B Test Calculator lets you calculate A/B test significance between two variants. Compare conversion rates with visitor and conversion data for each variant.. Everything runs inside your browser — nothing is uploaded to a server. It works on any device with a modern web browser.
Calculate A/B test significance between two variants. Compare conversion rates with visitor and conversion data for each variant. It's ideal for developers, designers, and anyone who needs to calculate a/b test significance between two variants without installing software or sending data to external servers.
Direct text entry, file upload, or URL-based input — depending on the tool. All numeric values are entered through input fields with real-time updates.
Yes. After the initial page load, A/B Test Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Yes, this tool is completely free. No credit card or registration is required for standard usage.
All processing happens 100% locally in your browser. Your data is never uploaded to any server.
Yes. Once the page has loaded, the tool runs entirely offline without requiring an internet connection.
Standard tools are unlimited. Pro tools allow free daily usage with an option to upgrade.
Any modern web browser (Chrome, Firefox, Safari, Edge) on desktop or mobile. No installation needed.
Percentage Calculator
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
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Computes Body Mass Index from metric or imperial height and weight inputs, categorizing the result into underweight, normal, overweight.
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