NFPA 704 Diamond
Build a print-ready hazard diamond. Pick health, fire, and reactivity ratings; add a special hazard symbol if needed. Export as SVG and paste into your placard, label, or SOP.
How to use this tool
Make the four-colour NFPA 704 "fire diamond" for a container, door or SOP. Set the three hazard numbers (and a special symbol if needed), watch the diamond update live, then download it as a clean SVG.
What to enter
- Health (blue): 0 (normal material) to 4 (deadly on brief exposure).
- Flammability (red): 0 (won't burn) to 4 (flashes/ignites readily).
- Instability (yellow): 0 (stable) to 4 (may detonate).
- Special (white): optional symbol: OX oxidiser, W̶ water-reactive, SA simple asphyxiant, COR corrosive, and more. Take all four values from SDS Section 14 / the supplier.
Reading the result
The preview shows the finished diamond with the numbers in their standard positions (health left, fire top, instability right, special bottom) and a one-line summary. Use Download SVG for a crisp, scalable placard file.
Worked example
Acetone is Health 1, Flammability 3, Instability 0, set those and the red top reads 3 (high fire risk), blue 1, yellow 0; export the SVG for your solvent cabinet label.
Ratings
Preview
Positions are fixed by the standard: health left (blue), fire top (red), instability right (yellow), special at the bottom (white). Each number runs 0 (minimal) to 4 (severe). Download SVG for a crisp, scalable placard, and always cross-check the four values against the SDS (Section 14) before posting one.
Methodology
The diamond is rendered as a single SVG. Four sub-diamonds (rotated 45°) display health (blue, left), flammability (red, top), instability (yellow, right) and special hazards (white, bottom). Numbers run 0 (no hazard) through 4 (severe hazard). Special symbols include OX (oxidiser), W̶ (water-reactive), SA (simple asphyxiant), and COR (corrosive).
Sources
- NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response (2022).
- NFPA 704 ratings are NOT a substitute for the Safety Data Sheet, always cross-check against the SDS before printing a placard.