About Us

RatioSolver.com was built for the exact moment you hit a proportion and your brain goes: “Wait… what do I multiply, and what do I divide?” Ratios show up everywhere—recipes, maps, scale drawings, chemistry, stats, finance, and everyday comparisons—and the math is simple, but it’s also easy to mix up under time pressure.

So we built a tool that’s fast and straightforward: type your values into A : B = C : D, leave one field empty to solve the missing value, or fill all four to check whether the proportion is TRUE or FALSE. Everything updates instantly (no “Calculate” button needed), and you can control rounding using the Decimals setting.

What makes this ratio solver different

• Built on the core rule: cross-products (A × D = B × C), explained in plain language.
• Two modes, one interface: solve missing values or verify equivalent ratios.
• Shareable outputs: “Share Result” copies a clean summary to your clipboard for homework, notes, or quick proofs.
• Practical extras: related calculators and FAQs for common ratio questions (fractions, equivalent ratios, golden ratio).
• Global-friendly: multiple language options via the footer language selector.

Our principles

• Clarity over clutter. Inputs first, result immediately.
• Transparent math. If you want the “why,” it’s on the page—not hidden.
• Privacy by default. No accounts, no forced signups to solve a ratio.
• Speed matters. Designed to feel instant on phones and laptops alike.

Say hello

If you spot an issue, want new ratio features (like scaling ratios or step-by-step solutions), or have feedback on the wording and examples, reach us via the contact page.

Last updated: November 30, 2025