Solve proportions with three known values. Find the missing value in a:b = c:d ratio equations. Everything runs locally in your browser — nothing is uploaded.
Calculate the aspect ratio from width and height dimensions. Find the simplified W:H ratio for images, videos, and screens. Everything runs locally in your browser — nothing is uploaded.
Simplify ratios to their lowest terms. Enter two numbers to find the simplest whole-number ratio between them. Everything runs locally in your browser — nothing is uploaded.
Solve quadratic equations of the form ax² + bx + c = 0. Get real and complex roots with step-by-step solutions. Everything runs locally in your browser — nothing is uploaded.
Projects customer lifetime value using average order value, purchase frequency, gross margin, and estimated customer lifespan in months. SaaS founders and e-commerce operators use LTV to determine acquisition budgets, segment high-value customers, and forecast recurring revenue.
Calculate Annual Contract Value (ACV) by dividing total contract value by the contract term in years.
Proportion Calculator lets you solve proportions with three known values. Find the missing value in a:b = c:d ratio equations. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Solve proportions with three known values. Find the missing value in a:b = c:d ratio equations. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Enter numeric values in the input fields — amounts, rates, or percentages.
Yes. After the initial page load, Proportion Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
Solve proportions with three known values. Find the missing value in a:b = c:d ratio equations. Everything runs locally in your browser — nothing is uploaded. All calculations happen in your browser.
All calculators use standard mathematical formulas with high precision. Results are rounded per the calculator's conventions.
Yes for general calculations, but verify critical results independently.
No. All calculations happen in your browser — no data is stored on any server.