Estimate the weight saving from converting images to AVIF.
AVIF compresses better than WebP, typically saving another 20 per cent, but encoding is far slower. That makes it best suited to build-time conversion rather than on-the-fly generation. Serving AVIF with WebP and JPEG fallbacks captures the maximum saving per browser at the cost of storing three variants.
AVIF Savings
AVIF weight = JPEG weight × (1 − saving); typical saving is 40 to 55 per cent
AVIF weight = JPEG weight × (1 − saving); typical saving is 40 to 55 per cent AVIF compresses better than WebP, typically saving another 20 per cent, but encoding is far slower. That makes it best suited to build-time conversion rather than on-the-fly generation.
Serving AVIF with WebP and JPEG fallbacks captures the maximum saving per browser at the cost of storing three variants.
This calculator takes 4 inputs: Current JPEG weight, AVIF saving against JPEG, WebP saving for comparison, Monthly visits. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.