Estimate the weight saving from converting images to WebP.
WebP typically saves 25 to 35 per cent against JPEG at visually equivalent quality, and considerably more against PNG for photographic content. Browser support is now effectively universal. Serving WebP with a JPEG fallback through the picture element captures the saving with no risk to older clients.
WebP Savings
WebP weight = JPEG weight × (1 − saving); typical saving is 25 to 35 per cent
WebP weight = JPEG weight × (1 − saving); typical saving is 25 to 35 per cent WebP typically saves 25 to 35 per cent against JPEG at visually equivalent quality, and considerably more against PNG for photographic content. Browser support is now effectively universal.
Serving WebP with a JPEG fallback through the picture element captures the saving with no risk to older clients.
This calculator takes 4 inputs: Current JPEG or PNG weight, WebP saving against JPEG, Monthly visits, Connection speed. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.