Free Tool
Pick your iPhone and charger to estimate how long it takes to charge. A faster charger (20W or more) makes a real difference up to 50%.
Estimates based on each model's battery size and Apple's "up to 50% in around 30 minutes with a 20W+ adapter" guidance. Real times vary with temperature, cable, background activity and battery health. iPhones cap their own charge speed (around 20W to 27W), so a 30W+ charger won't charge faster than a 20W one on most models, it just won't hurt.