Estimate how long your iPhone will take to reach full charge.
How long does an iPhone take to charge?
It depends on your model and charger. With the right adapter, Apple says the iPhone 18 Pro and 18 Pro Max reach 50% in around 15 minutes, the iPhone 17, 17 Pro and 17 Pro Max in around 20 minutes, and the iPhone 17e and iPhone Air in around 30 minutes. The last 20% always charges more slowly, so going from 50% to 100% takes longer than the first half. Pick your model, battery level and charger above for your own estimate.
How to Use the iPhone Charging Time Calculator
This free iPhone charging time calculator estimates how long your iPhone will take to reach 100% from where it is right now. It takes three inputs and gives you an answer in seconds — no signup, nothing to install.
- Choose your iPhone model. Not sure which one you have? Apple's guide to identifying your iPhone model shows where to find it in Settings.
- Set your current battery percentage with the slider.
- Pick the charger you're using — wired USB-C, an older USB-A brick, Qi, Qi2, or MagSafe.
You'll see an estimated time to 100%, split into two parts: the time to reach 80%, and the time from 80% to full.
How the Estimate Works
The calculator combines your model's battery capacity with the power your charger can actually deliver. That second part matters: an iPhone only draws as much power as it's designed to accept, so a charger rated above your model's limit won't charge it any faster. Charging also slows down as the battery fills, which is why the last 20% gets its own line — the final stretch usually takes longer per percent than the first 80%.
Apple publishes the adapter each model needs to fast charge in its Fast charge your iPhone guide. If your charger falls short, check it with our iPhone charger wattage checker.
Why Your Real Charging Time Might Be Different
Treat the result as a realistic best case. These are the most common reasons a real charge takes longer:
- Optimized Battery Charging or Charge Limit can deliberately hold your iPhone at 80% — Apple explains how in About Charge Limit and Optimized Battery Charging.
- Heat. iPhone slows or pauses charging when it gets too warm, which is common on wireless pads — see why your iPhone gets hot while wireless charging.
- Using the phone while it charges. Games, navigation, and video calls draw power at the same time.
- Cable, port, or case issues that reduce the power actually reaching the phone.
- An older battery. Worn batteries can charge less consistently — check yours with the iPhone battery health checker.
If your iPhone is consistently much slower than the estimate, work through our guide on why your iPhone is charging slowly. If you see a "Slow Charger" alert, Apple's page on iPhone charge speeds and our explainer on the Slow Charger message on iPhone cover what it means.
Frequently Asked Questions
How long does it take to charge an iPhone to 100%?
It depends on your model, your charger's wattage, and your starting percentage. With a fast charger the first 80% goes quickly and the last 20% takes longer. With an old 5W brick, a full charge takes several hours. Enter your details above for an estimate.
Is wireless charging slower than wired?
Generally yes. MagSafe and Qi2 close much of the gap compared with basic Qi pads — see our Qi2 vs MagSafe comparison.
Will a higher-wattage charger damage my iPhone?
No. A USB-C Power Delivery charger only supplies what your iPhone requests, so a larger charger is safe — it just won't charge faster than your model's limit.
Why does my iPhone stop at 80%?
Usually it's Optimized Battery Charging or a Charge Limit you've set, not a fault. For other charging problems, see our full iPhone battery and charging problems guide.