Kite calculators
by Jesse Gersenson

Online calculations for kite builders and others using carbon or fiberglass spars

Kite spar calculator
figure out which spars to use when scaling a plan up or down. Includes carbon and fiberglass spars.

DT Delta Kite Calculator
calculates dimensions for a tunnel keel delta

Delta kite calculator
calculates delta kite dimensions. The underlying equations are Dan Leigh's "standard delta" formula