Long effort
Route sections
Use French route grades for sustained sequences of roughly 15 moves or more.
Free climbing tool
Route and boulder grade calculator
Break your climb into sustained sections, boulder cruxes, single moves, and rests. Get an estimated final grade from the full sequence.
Effort builder
Break your climb into sections
Grade the whole climb
Calculate climbing difficulty section by section
One crux rarely tells the full story. Route difficulty also comes from sustained movement, the order of hard sections, accumulated pump, and how much you can recover. This calculator models the climb from ground to anchor—or start to finish for a boulder.
Power
Boulder cruxes
Use Font grades for short, intense sections of approximately 5–10 moves.
Recovery
Rest quality
Choose good, medium, bad, or no rest to model how much fatigue carries forward.
How the estimate is calculated
The model treats climbing grades as a linear difficulty scale, combines consecutive efforts through an energy curve, and reduces carried fatigue according to rest quality. Very easy sections stop changing the result; much harder sections dominate it.
Boulder cruxes are converted asymmetrically: power at the start is less costly than the same power sequence after sustained climbing. Results include soft, hard, and split-grade estimates when difficulty falls between grades.
How does the climbing route grade calculator work?
Describe the climb from bottom to top. Add sustained route sections, short boulder cruxes, and the rest quality between them. The estimator combines their difficulty, order, and accumulated fatigue into a final French route grade.
How do I calculate a boulder grade from individual moves?
Choose Boulder, add sections of two to five moves or isolated hard moves, then select an approximate Font grade for each effort. The calculator combines the sequence into an estimated overall boulder grade.
Why does section order change the result?
A hard boulder crux after sustained climbing is usually more demanding than the same crux at the start. The model accounts for accumulated fatigue and reduced power later in the climb.
Are calculated climbing grades exact?
No. The result is a structured estimate. Real grades depend on rock type, movement, route length, conditions, beta, morphology, local grading, and climber consensus.
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