Height / RL from Slope & Length

Enter slope and horizontal length to get the height change and final RL.

Inputs

Starting height / RL	m Leave blank to treat as 0 (rise only)
Slope	1 in % Negative value = downhill (fall)
Length (horizontal)	m

Results

Height change	—
Final height / RL	—

Height change = slope × horizontal length. In 1 in X mode, slope = 1 ÷ X (e.g. 1 in 20 = 5%); use a negative X for downhill. RLs are shown to 3 decimal places as per survey convention. For reference and checking only — verify with a qualified engineer.