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Climbing Grade Converter

Convert climbing grades between YDS, French, UIAA, British trad, Ewbank and Saxon for roped routes, and between the V-scale and Fontainebleau for bouldering.

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Open Climbing Grade Converter and you get an answer straight away, with no account to create. Its place is under Running & endurance; Backpacking Food Weight Calculator and Bike Gear Ratio Calculator answer the questions closest to this one.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Climbing Grade Converter?

Convert climbing grades between YDS, French, UIAA, British trad, Ewbank and Saxon for roped routes, and between the V-scale and Fontainebleau for bouldering.

When would I actually use this?

Preparing a race: the pace a target time needs, the splits to hold it, and the training zones that sit under it — on foot, and equally on a bike or in a pool, where the same session is measured in watts or in a hundred-metre split instead.

What is the most common mistake?

Scaling a time linearly to a longer distance. A marathon is not two half-marathons; race predictors use an exponent around 1.06 precisely because fatigue is not proportional.

Is there a tool for the next step?

Bike Gear Ratio Calculator is the closest one after this: Chainring and cog teeth to gear ratio, gear inches, metres of development, Sheldon Brown gain ratio and speed at your cadence, with a full gear chart.

What else is worth having open alongside it?

Gym vs Home Workout Cost Calculator and Hiking Time Calculator (Naismith) — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

Pace arithmetic is exact. Race predictions follow Riegel's formula, which assumes training matched to the longer distance — without it the prediction is optimistic.

Further reading

All guides →
ExplainerClimbing Grade Conversions Are Not ConversionsFrench, YDS, UIAA, V-scale and Font are ordinal scales with no underlying unit. A conversion table is a negotiated alignment between climbing communities — and published tables disagree by half a grade at the top and by four letter-grades at the bottom of the boulder scales.ExplainerGear Inches, Development, and Why Cyclists Argue About Ratios50/11 means nothing until you attach a wheel. Gear inches and metres of development, derived and converted, a full table for a real 12-speed drivetrain, and why the gear step between two sprockets decides whether you can hold a cadence.ExplainerTent Footprints, Floor Area and the Numbers That Do Not Mean What You ThinkThere is a standard behind two-person, and its berth is 24 inches wide. Divide real floor plans by their occupants, compare the result with a sleeping pad, then compute how much of a quoted peak height actually exists: in a straight-sided A-frame, sitting height covers 18 per cent of the floor width.GuideHow Much Food to Carry: The Number That Matters Is Calories per GramA published walking-energetics equation turns body mass, pack weight, speed and terrain into a daily calorie figure. But calories are not what you carry — mass is. Work the arithmetic and the planning number stops being calories per day and becomes calories per ounce.ExplainerTraining Zones Are a Model, Not a MeasurementEvery zone scheme is a set of percentages of some anchor, and the anchor is the whole argument. One runner, three published schemes: the ceiling of easy aerobic work lands at 131, 141 or 150 bpm. And if the anchor is 220 minus age, a two-standard-deviation error moves one boundary by 30 bpm.GuideHiking Pace: Naismith's Rule and the Corrections It NeedsNaismith's 1892 rule times a route in two lines of arithmetic. It also ignores descent completely and assumes a fit walker with no pack. Here is the rule, Langmuir's fix, and Tobler's continuous alternative — whose fastest speed is on a downhill, not on the flat.