Tongue Weight Calculator with transparent formulas, clear units, and instant results. Tongue load at target: T = Mₜ × r ÷ 100.
Stable formula
This calculator uses a stable mathematical formula. Always verify the values you enter.
Accuracy level
High when inputs and units are correct.
Last reviewed
July 9, 2026
Formula or source
Stable mathematical formula explained on the page.
Guide reading time
4 min
Confidence
High for the stated calculation.
Result type
Formula result, not an official certification.
Do not use for: Cases with missing data, unclear units, or a required professional certification.
How Tongue Weight Calculator works
The Tongue Weight Calculator uses these inputs: Loaded trailer weight, Desired tongue percentage. Its primary output is Tongue load at target. The calculation compares entered masses and loads with limits supplied by the user.
The engine implements T = Mₜ × r ÷ 100. Validation runs first to reject zero divisors and non-finite values.
Numeric example using the starting values: Tongue Weight Calculator: Loaded trailer weight: 1500 · Desired tongue percentage: 10. The resulting output is Tongue load at target: 150.00 kg.
Tongue Weight Calculator: This result is a calculation estimate only. It does not approve installation, safety, legality, or vehicle fitment. Verify it with the vehicle manufacturer, a qualified professional, and local law. Load distribution, trailer design, brakes, hitch, registration, and manufacturer data determine actual suitability.
💡 Useful Tips
Do not mix units between Loaded trailer weight and Desired tongue percentage; make sure both describe the same scenario. Use scale weights and verify the vehicle and trailer plates and local rules.
Do not treat Tongue Weight Calculator — Tongue load at target as mechanical, safety, legal, or financial approval.
Frequently Asked Questions
What does Tongue load at target mean?
It is the direct output of the formula and entered values, and applies only to the defined scenario.
Which inputs change the result?
The active inputs are Loaded trailer weight, Desired tongue percentage. Changing any one runs the same formula again. Being within the entered numbers is not approval to tow.
What to check next
The result is a starting point. For a clearer picture, continue to a related calculator or read a short guide that explains the assumptions.