Civil engineering and construction calculators
Each calculator comes with the method, a worked example, reference tables and sources.
Drainage and grading
Gutter slope calculator: total drop, grade and marking points for a gutter run.
Hydraulics
Pipe flow calculator (Manning): flow, velocity, slope or depth for a gravity pipe flowing partly full.
Aggregate and soil
Gravel calculator: cubic yards and tons of gravel for an area and depth.