How to use the Internet Speed Calculator
Fill in the fields on the left. Results, charts and the breakdown update instantly as you type or move a slider. Pick your country at the top of the page to switch currency.
Formula
Need = people × 3 + HD streams × 5 + 4K streams × 25 + video calls × 4 + gamers × 5 + devices × 1 Mbps, plus 25% headroom
Frequently asked questions
Is 100 Mbps fast enough?
For most households of 2–4 people, yes, including 4K streaming. Larger families with several 4K streams may want 200–300 Mbps.
Results are estimates for information only and are not financial, tax or legal advice. Tax rules, interest rates and fees change, so confirm important numbers with your bank, employer or a qualified adviser. Read our disclaimer.