🕙 Paris to London Time Converter

London is 1 hour behind Paris for most of the year: when it is 10:00 am in Paris it is 9:00 am in London. In offset terms Paris is on UTC+01:00 and London is on UTC+00:00 in January, and UTC+02:00 and UTC+01:00 in July. The converter above works from your browser’s own time zone data, so the figure it shows is the one in force today rather than the one that was in force when this page was written.

Both cities observe daylight saving and switch on the same dates — 29 March and 25 October in 2026 — so the two clocks move together. The difference is therefore fixed for all of 2026, which makes this one of the few city pairs where a single number is the whole answer: London is always 1 hour behind Paris. Recurring meetings between the two never drift, and the table below confirms it period by period.

For arranging anything, the number that matters is the overlap. Paris works 09:00 to 18:00 and London works 09:00 to 17:30, which leaves 10:00 to 18:00 in Paris — 09:00 to 17:00 in London — as the window when both are open. That is 8 hours of shared working time. Both cities work Monday to Friday, so only the clock has to be reconciled.

Two local details worth knowing. Offices commonly run to 18:00 with a genuine lunch break around 13:00, so mid-afternoon is the reliable slot. The City works 09:00 to 17:30, and the 08:00 market open means email is answered well before the official start.

The safest way to write a time for these two cities is to give both, as in "10:00 Paris / 09:00 London", or to give the UTC offset. Abbreviations are the trap: Paris is on CET for part of the year and CEST for the rest, and the same three letters are reused in other parts of the world for entirely different offsets.

The formula

local Paris

The time you enter, on the Paris clock

offset

Each city’s UTC offset at that moment, read live from the IANA time zone database in your browser

−1

The difference in hours that holds for most of 2026: London is 1 hour behind Paris

day shift

Whether the converted time falls on the previous, same or next calendar day in London

How it works, step by step

1. Enter a time in Paris using the 24-hour hour box and the minute box — 15:30 is hour 15, minute 30.
2. Your browser reports the UTC offset in force in Paris and in London for that moment, so a date near a daylight saving transition is handled correctly rather than with a fixed 1 hour rule.
3. The second offset minus the first gives the difference, which is added to the time you entered. A result past midnight is marked as the next or previous day, because that is where most conversion mistakes live.
4. The panel also shows the current time in both cities, the date in London, and whether the two offices are open at the same moment.

Worked examples

How to read your score

Frequently asked questions

Paris to London: every hour, every period of 2026, and meeting slots

Related calculators