Cessna 172 Takeoff Distance Calculator
C172S-style takeoff estimate from pressure altitude, temperature and weight — the trainer everyone flies, with the corrections everyone forgets.
Anchored to the published C172S sea-level figures (960 ft roll / 1,630 ft over 50 ft at 2,550 lb, ISA). Short-field technique (10° flaps, 56/61 KIAS) is assumed — sloppy speeds add hundreds of feet the math can't see.
Formula
⚠️ Planning estimate only — your POH/AFM performance charts are the authoritative source. Always verify with official data, and apply your operator's safety factors. Not for airworthiness decisions.
C172S-style takeoff estimate from pressure altitude, temperature and weight — the trainer everyone flies, with the corrections everyone forgets.
About Cessna 172 Takeoff Distance Calculator
More pilots learn performance planning in a Cessna 172 than any aircraft in history, so here is the Skyhawk's takeoff math as a live calculator: enter pressure altitude, temperature and weight, and get ground roll and 50-ft figures scaled from the published C172S sea-level data using the density-ratio and weight-squared laws. It mirrors how the POH chart behaves between its printed lines — and shows the density altitude it implied, which the chart never tells you.
How to use Cessna 172 Takeoff Distance Calculator
- 1Enter — sensible defaults are pre-filled so you see a worked result immediately.
- 2Read the live results: .
- 3Check the "With your numbers" line to see the formula base 960/1,630 ft (C172S, SL/ISA/max gross) × 1/σ² × (W/2550)² substituted step by step.
- 4Adjust inputs (or flip the unit toggle) until the scenario matches yours, then copy or share the result.
Why use Cessna 172 Takeoff Distance Calculator?
- ✓Instant, free and private — every calculation runs in your browser, nothing is uploaded
- ✓Built on the published formula base 960/1,630 ft (C172S, SL/ISA/max gross) × 1/σ² × (W/2550)² with sources cited on the page
- ✓Anchored to the published C172S sea-level figures (960 ft roll / 1,630 ft over 50 ft at 2,550 lb, ISA). Short-field technique (10° flaps, 56/61 KIAS) is assumed — sloppy speeds add hundreds of feet the math can't see.
- ✓Switch units, tweak any input and watch every result update live
Frequently asked questions
How close is this to the actual C172S POH chart?+
Within a few percent across the chart's normal envelope (sea level to 8,000 ft PA, 0–40 °C), because the chart itself follows the same physics. The POH remains authoritative — Cessna's numbers include flight-test specifics and the legally required configuration. Use this for instant what-ifs, then confirm in Section 5 before you fly.
What technique do the book numbers assume?+
Short-field procedure: 10° flaps, brakes held to full throttle, rotation at 51 KIAS, 56 KIAS climb over the obstacle (61 with flaps up). The POH also assumes a paved, level, dry runway and zero wind. Every deviation — rolling start, late rotation, no flaps — inflates distance beyond anything in this calculator.
Why does 100 lb of weight matter so much?+
Distance scales with weight squared: lift-off speed rises with √W and acceleration falls as 1/W. Going from 2,550 to 2,250 lb — roughly one passenger and half fuel — cuts the roll about 22%. Weight is the one performance variable entirely under your control on a hot day.
Do the same numbers apply to older 172 models?+
No — a 1970s 172M with 150 hp has meaningfully longer distances and different speeds than the 180 hp S model used here (the M's book roll is about 865 ft but at 2,300 lb gross). The scaling laws are identical, so the tool's structure applies, but anchor your planning to your specific model's POH figures.
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