How Long Is It?

Calculate days between any two dates

Calculate your exact age down to the second

Live countdown to Christmas Day

Count down to any date

Calculate business days excluding UK bank holidays

Calculate age gap between two people

Calculate days between any two dates

Count down to any date

Calculate your exact age down to the second

Calculate age gap between two people

Live countdown to Christmas Day

Calculate business days excluding UK bank holidays

Earth to Moon distance

Earth to Sun distance

Earth to Mars distance

Earth to Venus distance

Earth to Mercury distance

Earth to Jupiter distance

Earth to Saturn distance

Earth to Uranus distance

Earth to Neptune distance

Earth to Pluto distance

Distance to the ISS

Distance to the edge of space

Distance to Proxima Centauri

Earth's circumference

Earth's diameter

Earth's radius

Mariana Trench depth

Mount Everest height

UK's highest peak

Wales' highest peak

Great Wall length

Length of Britain

UK width

Channel width at Dover

Thames length

Hadrian's Wall length

London to Edinburgh distance

London to Manchester distance

London to Birmingham distance