Caster, Camber & Toe Angle Calculator
Analyze toe-in, toe-out, and zero toe — degrees to mm conversion plus handling and tire wear effects.
Quick Answer
For a typical passenger car front suspension: camber −0.5° to −1.0° (negative camber improves cornering), caster +4° to +7° (positive aids straight-line stability), and front toe-in 0° to +0.2°. A 0.5° total toe-in on a 1,500mm track equals ≈ 13mm — enough to cause inner-edge feathering if set incorrectly.
| Alignment Angle | Typical Spec |
|---|---|
| Typical passenger car front camber | −0.5° to −1.0° (negative camber improves cornering) |
| Typical passenger car front caster | +4° to +7° positive (improves straight-line stability) |
| FWD car front toe | 0° to +0.2° toe-in (compensates for thrust under power) |
| RWD car rear toe | 0° to +0.2° toe-in (stability) |
| 0.5° toe on 1,500mm track width | ≈ 13mm total toe-in |
Note: 1° toe ≈ 17.5mm on a 1,000mm track width. Always align after suspension or wheel changes.
Positive = toe-in · Negative = toe-out · Range ±2°
Used for degrees ↔ mm conversion. Default 620 mm covers most 17–18" fitments.
Toe-In
Per-wheel
+0.1°
Total (axle)
+0.2°
Per-wheel (mm)
+1.1 mm
Total (mm)
+2.2 mm
Handling Effect
Increases straight-line stability and self-centring. Can slightly blunt initial turn-in; adds understeer if overdone.
Tire Wear Effect
Outer tread-edge scrub. Excessive toe-in accelerates outer-shoulder feathering.
These are general guidelines. Actual impact depends on suspension geometry, vehicle type, and driving conditions. Use a calibrated alignment machine for any real adjustments.
Get a plain-English explanation of your results — what they mean for your vehicle and driving experience.
Toe Angle Effects Reference
| Toe Setting | Steering Effect | Tire Wear | Best For |
|---|---|---|---|
| Mild Toe-In (+0.05° to +0.15° per wheel) | Improved straight-line stability; smoother highway tracking | Slight outer-edge scrub if excessive | Most factory street alignments, daily drivers |
| Zero Toe (0° total) | Neutral feel; good balance between stability and response | Minimizes scrub-related wear | Balanced street/spirited driving, many OEM rear settings |
| Mild Toe-Out (−0.05° to −0.15° per wheel) | Quicker turn-in; more responsive steering | Inner-edge feathering if run on street long-term | Track and autocross front setups, sporty street cars |
| Excessive Toe (>|0.3°| per wheel) | Wanders or feels darty; adds understeer (toe-in) or oversteer (toe-out) | Rapid feathered wear and heat build-up | Not recommended — usually indicates misalignment or damage |
Alignment Angles Explained
- Toe — most adjustable angle; directly affects tire wear and straight-line tracking
- Camber — affects cornering load distribution; negative camber increases inner-shoulder wear on the street
- Caster — primarily affects steering feel and return-to-centre; not adjustable on many modern vehicles
How to Use This Calculator
- 1Enter toe angle per wheel: Input the toe angle in degrees. Positive = toe-in, negative = toe-out. Use the ± buttons to step in 0.05° increments.
- 2Enter wheel + tire diameter: Input overall diameter in mm (default 620mm covers most 17–18" fitments). Used for the degrees-to-mm conversion.
- 3Click Analyze Toe Angle: The calculator shows toe type, per-wheel and total angle in degrees and mm, plus handling and tire wear effects.
- 4Compare to your factory spec: Look up your vehicle's alignment specification. The typical street window is +0.05° to +0.15° front toe-in per wheel.
- 5Book an alignment if outside spec: Any toe value outside the manufacturer's window will cause accelerated feathered wear and should be corrected by a qualified technician.