Online Ratio Calculators and Conversion Tools

Access 21 online ratio tools to calculate proportions, simplify ratios, and scale dimensions. Secure server-side processing with automatic file deletion.

Our ratio tools simplify mathematical proportions and scaling tasks directly in your browser. Whether you need to calculate aspect ratios, simplify complex fractions, or scale dimensions for design and engineering, these 21 utilities provide fast results via our secure servers without requiring any software installation.

21 Tools

Images, Audio & Video
Audio Channel Mixer
Mix left and right channels into mono with specific ratios
Images, Audio & Video
Audio Compressor
Apply dynamic range compression with configurable threshold, ratio, attack/release, and makeup gain
Images, Audio & Video
Chrome Web Store Screenshots Resized
Resize images to Chrome Web Store screenshot dimensions while preserving full content and aspect ratio for extension and app listings
Design & Color
Color Contrast Checker
Check color contrast ratio and WCAG compliance for accessibility
Data & Tables
Data Crosstab Generator
Advanced crosstab (pivot table) generator that creates powerful cross-tabulation analysis from your data. Perfect for business intelligence, statistical analysis, data exploration, and reporting. Features: - Multiple aggregation functions (sum, count, average, min, max, median) - Flexible row and column grouping - Percentage and ratio calculations - Row/column totals and grand totals - Multi-dimensional analysis - Conditional formatting support - Statistical significance testing - Custom sorting and filtering - Export-ready formatting Common Use Cases: - Sales analysis by region and product - Customer demographics analysis - Financial statement analysis - Survey response analysis - Inventory turnover analysis - Performance metrics tracking
Math, Date & Finance
F Distribution Calculator
Calculate F distribution density, cumulative probability, and right-tail probability from numerator and denominator degrees of freedom
Math, Date & Finance
Fibonacci Sequence Generator
Generate Fibonacci sequence with customizable start numbers, length, and output format. Includes golden ratio analysis and mathematical properties.
Math, Date & Finance
Fraction Decimal Converter
Convert between fractions and decimals with support for mixed numbers, improper fractions, and various decimal formats
Math, Date & Finance
Geometric Mean Calculator
Calculate the geometric mean of positive numeric values for growth rates, ratios, and multiplicative datasets
Math, Date & Finance
Geometric Sequence Calculator
Calculate the nth term, first terms, and finite sum of a geometric sequence
Design & Color
Image Cropper
Crop images to specific dimensions or aspect ratios with custom positioning
Images, Audio & Video
Image Resizer
Professional image resizing tool with multiple resize methods, aspect ratio preservation, and format conversion, supporting GIF/Animated WebP/APNG and JPEG/PNG/WEBP.
Images, Audio & Video
Convert JPEG to AVIF
Convert JPEG images to AVIF format with next-generation compression and superior quality-to-size ratio
Images, Audio & Video
Convert JPEG to WebP
Convert JPEG images to WebP format with modern compression and better quality-to-size ratio
Math, Date & Finance
Percentage Calculator
Solve common percentage questions including percentage of a total, value from a percentage, and percentage change
Math, Date & Finance
Percentage Calculator
Calculate percentages, percentage changes, and percentage relationships between numbers
Images, Audio & Video
Convert PNG to AVIF
Convert PNG images to AVIF format with next-generation compression and superior quality-to-size ratio
Math, Date & Finance
Proportion Calculator
Solve proportion equations of the form a/b = c/d and calculate the missing term
Math, Date & Finance
Ratio Calculator
Simplify ratios, calculate ratio shares, and convert between ratio, fraction, and decimal forms
Health, Sports & Fitness
Waist to Height Ratio Calculator
Calculate waist to height ratio for health assessment
Health, Sports & Fitness
Waist to Hip Ratio Calculator
Calculate waist to hip ratio and assess health risks

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FAQ

How do I use these ratio tools?

Simply enter your values or upload your data through the browser interface. The calculations are performed on our servers, and you can download or copy the results immediately.

Is my data secure when calculating ratios?

Yes. While processing occurs on our servers, text inputs are never stored. Any files uploaded for processing are automatically and permanently deleted after 6 hours.

Can I calculate aspect ratios for images or screens?

Yes, the collection includes tools specifically designed to determine aspect ratios, scale dimensions proportionally, and find missing values in mathematical ratios.