Mono-pitched roof volume calculator

Mono-pitched roof | skeleton

Mono-pitched roof | formula


The formula is also suitable for cubic feet.

Calculate the volume of a Mono-pitched roof

– Metric form gives cubic meters / m3
– Fill out meters with decimals (e.g. 1 or 1.2 or 1.23)
– Decimals with a point ‘.’ , not a comma ‘,’

– Imperial form gives cubic feet
– Fill out ‘0 inches’ if you have only feet.


Mono-pitched roof | isometric view


Mono-pitched roof | top view

About the Mono-pitched roof

A mono-pitched roof has a single sloping roof plane, which isn’t attached to any other roof plane in any way.

Where the pitch (slope) of a mono-pitched roof is minimal or negligible, it’s then simply referred to as a flat roof, or perhaps a sunroof or terrace roof depending on its use.

Different countries have defined a minimum pitch (slope) for a roof to be considered a mono-pitched roof:

  • US: min. 10°
  • UK: min. 10–12.5°
  • NL: min. 15°

To correct or add a specification for a country, please email me the details at

Synonyms mono-pitched roof

Depending on the country or region, you’ll hear the mono-pitched roof also referred to as a mono-pitch roof, single-pitch roof, single-pitched roof, or even a pent roof, shed roof, lean-to roof, or skillion roof, especially where it forms an add-on to an existing roof.

See also

truncated mono-pitched roof