Flag & Vexillology Tools
Free, practical tools for flag design and history — resolve proportions, spec a color, size a flag to its pole, translate semaphore, test your flag knowledge, and look up heraldic tinctures.
Flag Proportion & Ratio Calculator
Resolve a flag's fly from its hoist, or its hoist from its fly, at any hoist:fly ratio — 1:1, 2:3, 3:5, 1:2, and more — plus the resulting area.
Flag Color-Spec Reference
Convert a hex color to RGB and CMYK for a print or embroidery spec, and match it to the nearest of a small set of common flag hues.
Flag Size for Pole Height Calculator
Find the right flag size for a flagpole using the standard one-quarter-to-one-third rule, at any hoist:fly ratio.
Semaphore Flag Translator
Translate text into flag semaphore, the maritime and scouting hand-flag alphabet, showing the exact left- and right-arm position for every letter.
Flag Identifier Quiz
Eight questions per round describing a flag's colors and layout — pick the flag it belongs to and see your score.
Heraldry Tincture Reference
Look up the seven core heraldic tinctures with their Petra Sancta hatching pattern and traditional meaning, or match a hex color to the nearest one.
Flag Proportion Reference
Every common hoist:fly ratio in one place — which real flags use it, its shape at a sample size, and the recommended flag size it produces at five standard flagpole heights.