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Climbing Grade Converter Calculator

Instantly convert between climbing grade systems

Route Grade

5.10a

French

6a

UIAA

VII-

Grade Conversion

5.10a

All Systems

YDS (USA)5.10a
French6a
UIAAVII-
BritishE1 5b
Australian19

What You'll Need

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BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

BOSCH GLM100-23 100 Ft BLAZE Laser Distance Measure, Includes 2 AA Batteries

$49.004.4
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Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

Stanley FatMax 25 ft. L x 1.25 in. W Magnetic Tape Measure Yellow 1 pk

$23.404.7
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UUBAAR Ring Sizer Measuring Tool Kit, 27PCS Stainless Steel Ring Sizing Gauge Measurer, US Size 0-13 with Half Sizes, 2 Reusable Finger Sizer Belts US 1-17(1 with Magnifier), Men Women Wedding Jewelry

UUBAAR Ring Sizer Measuring Tool Kit, 27PCS Stainless Steel Ring Sizing Gauge Measurer, US Size 0-13 with Half Sizes, 2 Reusable Finger Sizer Belts US 1-17(1 with Magnifier), Men Women Wedding Jewelry

$4.193.7
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Tape Measure, iBayam Soft Ruler Measuring Tape for Body Weight Loss Fabric Sewing Tailor Cloth Vinyl Measurement Craft Supplies, 60-Inch Double Scale Ruler, 2-Pack Pastel Pink, Blue

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Example Calculations

1Convert 5.10a to other systems

Inputs

SystemYDS
Grade5.10a

Result

ConversionsFrench 6a, UIAA VII-, Aus 19

YDS 5.10a maps to French 6a, UIAA VII-, British E1 5b, Australian 19.

2Convert V5 bouldering

Inputs

SystemV-Scale
GradeV5

Result

Font Grade6C (Advanced)

V5 in the Hueco Scale equals Fontainebleau 6C, considered advanced level.

Frequently Asked Questions

Q

How do YDS grades compare to French grades?

YDS 5.10a equals French 6a, 5.11a equals 6c, and 5.12a equals 7b. French grades use numbers with letter suffixes (a, b, c) and plus signs for finer distinctions.

  • 5.9 = French 5c
  • 5.10a = French 6a
  • 5.11a = French 6c
  • 5.12a = French 7b
  • 5.13a = French 8a
YDSFrenchUIAALevel
5.85bVIIntermediate
5.10a6aVII-Advanced
5.12a7bIX+Expert
Q

What is the V-Scale for bouldering?

The V-Scale (Hueco Scale) rates boulder problems from VB (beginner) through V17 (world-class). V0–V3 is beginner to intermediate, V4–V7 is advanced, V8+ is expert.

  • VB–V0: beginner bouldering
  • V1–V3: intermediate
  • V4–V7: advanced
  • V8–V12: expert to elite
  • V13+: world-class
Q

Are grade conversions exact?

No. Grade conversions are approximate because each system evaluates difficulty differently. A route graded 5.10a in the US may feel easier or harder than a French 6a depending on the style.

  • Conversions are consensus estimates
  • Style differences affect perceived difficulty
  • Indoor grades often run soft
  • Outdoor grades vary by region
Q

What is the UIAA grading system?

The UIAA system uses Roman numerals (I through XII) with +/- modifiers. It is primarily used in German-speaking countries and parts of Eastern Europe.

  • I–III: easy scrambling
  • IV–VI: moderate climbing
  • VII–IX: advanced to expert
  • X–XII: elite and world-class

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Last Updated: Jun 18, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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