Tidal gate calculator (Rule of twelfths)

This calculator calculates tidal gates using the rule of twelfths, estimating the height of the tide at any time, given only the time and height of high and low water. The rule is a rough approximation only and should be applied with great caution when used for navigational purposes. Officially produced tide tables should be used in preference whenever possible.

Articles that describe this calculator

PLANETCALC, Tidal gate calculator (Rule of twelfths)

Tidal gate calculator (Rule of twelfths)


Digits after the decimal point: 1
Tidal gate open time
Tidal gate close time
Tidal gate duration
Rule of twelfths

Calculators used by this calculator