Sag
Calculate Sag instantly with the exact formula and a worked example. Free online calculator — no signup.
Sag
Span, m
Tension, kN
Weight/m, N/m
Sag
0.64m
f
0,64 m
More about: Sag
What it calculates
The “Sag” calculator computes Sag in m from 3 parameters: span, m, tension, kn, weight/m, n/m.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters Span, m = 80, Tension, kN = 5, Weight/m, N/m = 4 the result is 0.64 m (f = w·L² / (8·T)).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.