To convert kPa to PSI, multiply the kPa value by 0.14503773773. The exact formula is: PSI = kPa × 0.14503773773. Common tire pressure conversions: 200 kPa = 29.01 PSI, 210 kPa = 30.46 PSI, 220 kPa = 31.91 PSI, 230 kPa = 33.36 PSI, 240 kPa = 34.81 PSI, 250 kPa = 36.26 PSI, 260 kPa = 37.71 PSI, 270 kPa = 39.16 PSI, 300 kPa = 43.51 PSI. To change kPa to PSI in a Subaru, press and hold the I·SET button on the steering wheel, navigate to Screen Settings → Tire Pressure Units, and switch to PSI.
kPa to PSI Calculator
Instantly convert kilopascals to PSI — for tyre pressure, boost / MAP sensor readings, and vacuum. Includes a full conversion chart, vehicle-type pressure guide, and step-by-step TPMS unit-change instructions for Subaru, Jeep, and Mercedes.
QUICK EXAMPLE
A Subaru Outback owner in Canada receives their vehicle with the TPMS dashboard displaying 240 kPa — the factory-specified cold-inflation pressure for the front axle. Their garage tyre gauge reads in PSI. The conversion: 240 kPa × 0.14504 = 34.81 PSI. Without this conversion, a common mistake is inflating to 240 PSI (dangerously over-inflated) or under-inflating by guessing. The same 240 kPa is also written as 2.40 bar on European gauges — three units, one pressure, zero ambiguity once you know the conversion factor.
kPa ↔ PSI Converter
Quick tire pressure presets
Most-searched conversions
How to Use This Calculator
- 1Tab 1 — Converter: Type any kPa value in the kPa field, or any PSI value in the PSI field. Both fields update each other live — no "Calculate" button needed. Click a preset button (180–350 kPa) to instantly load a common tyre pressure value. A context badge automatically identifies whether the value falls in the under-inflated, passenger car, SUV, or commercial range.
- 2Tab 2 — Tire Pressure: Browse the tyre pressure reference chart covering 180–350 kPa with PSI, bar equivalents, and a "typical use" column. Click any row to load it into the Converter. Scroll down for recommended cold-inflation pressures by vehicle type from economy sedans to heavy pickup trucks.
- 3Tab 3 — Boost / MAP: Use the MAP sensor absolute kPa to gauge boost PSI table for turbocharged engine tuning. The table shows MAP absolute pressure → gauge kPa → boost PSI → bar, plus a vacuum pressure table (negative gauge kPa) for intake diagnostics. Formula: Boost PSI = (MAP kPa − 101.325) × 0.14504.
- 4Tab 4 — Change Units: Step-by-step instructions for changing your vehicle's TPMS display from kPa to PSI for Subaru (all models), Jeep Renegade, Mercedes-Benz, and most modern vehicles. Covers model-specific button sequences and known software quirks.
- 5Tab 5 — Full Table: Choose one of three kPa ranges (1–100, 100–400, 400–1000) and scroll a sticky-header table with kPa, PSI, bar, and ATM columns. Click any row to load the value into the Converter tab.
- 6Global: The Converter tab provides a worked formula with your actual entered values, showing every arithmetic step. Use the "Copy Results" button to copy all six unit equivalents to clipboard.
kPa to PSI — Most-Searched Values
| kPa | PSI (exact) | PSI (rounded) | Bar | Context |
|---|---|---|---|---|
| 3 | 0.4351 | 0.44 | 0.030 | 3 kPa to PSI — very low pressure (vacuum test) |
| 4 | 0.5802 | 0.58 | 0.040 | 4 kPa to PSI — low vacuum reading |
| 5 | 0.7252 | 0.73 | 0.050 | 5 kPa to PSI — minor vacuum / leak check |
| 15 | 2.1756 | 2.18 | 0.150 | 15 kPa to PSI — partial vacuum / intake manifold |
| 20 | 2.9008 | 2.90 | 0.200 | 20 kPa to PSI — low pressure system |
| 100 | 14.5038 | 14.50 | 1.000 | 100 kPa to PSI — ~1 atm (atmospheric pressure) |
| 200 | 29.0075 | 29.01 | 2.000 | 200 kPa to PSI — small car tyres (low end) |
| 210 | 30.4579 | 30.46 | 2.100 | 210 kPa to PSI — compact car tyre front |
| 220 | 31.9083 | 31.91 | 2.200 | 220 kPa to PSI — common passenger car tyre |
| 230 | 33.3587 | 33.36 | 2.300 | 230 kPa to PSI — mid-size sedan tyre |
| 240 | 34.8091 | 34.81 | 2.400 | 240 kPa to PSI — Subaru / Honda / Toyota stock |
| 250 | 36.2594 | 36.26 | 2.500 | 250 kPa to PSI — SUV / crossover tyre |
| 260 | 37.7098 | 37.71 | 2.600 | 260 kPa to PSI — SUV rear axle, loaded |
| 270 | 39.1602 | 39.16 | 2.700 | 270 kPa to PSI — large SUV / van |
| 280 | 40.6106 | 40.61 | 2.800 | 280 kPa to PSI — heavy load / commercial van |
| 300 | 43.5113 | 43.51 | 3.000 | 300 kPa to PSI — light truck / LT tyre |
| 350 | 50.7632 | 50.76 | 3.500 | 350 kPa to PSI — heavy truck / high-load tyre |
All values computed via PSI = kPa × 0.14503773773 (NIST exact factor). PSI (rounded) is to 2 decimal places for practical use.
Tyre Pressure kPa to PSI — by Vehicle Type
| Vehicle Type | Front kPa | Front PSI | Rear kPa | Rear PSI | Examples |
|---|---|---|---|---|---|
| Economy sedan | 200 | 29.0 | 200 | 29.0 | Honda Civic, Toyota Corolla, VW Polo |
| Mid-size sedan | 220 | 31.9 | 220 | 31.9 | Toyota Camry, Honda Accord, Skoda Octavia |
| Compact SUV / crossover | 230 | 33.4 | 230 | 33.4 | RAV4, CR-V, Tucson, Tiguan |
| Mid-size SUV | 240 | 34.8 | 250 | 36.3 | Highlander, Pilot, Santa Fe, Kodiaq |
| Full-size SUV | 250 | 36.3 | 260 | 37.7 | Expedition, Tahoe, Land Cruiser, Discovery |
| Pickup truck (unloaded) | 230 | 33.4 | 230 | 33.4 | F-150, Silverado, RAM 1500, Hilux |
| Pickup truck (loaded) | 240 | 34.8 | 310 | 45.0 | Always check door-jamb sticker for load rating |
| Minivan | 240 | 34.8 | 260 | 37.7 | Sienna, Odyssey, Carnival, Grand Voyager |
| Sports car / coupe | 220 | 31.9 | 240 | 34.8 | Stiffer rear is common; always verify placard |
| Subaru (all models) | 240 | 34.8 | 240 | 34.8 | Outback, Forester, Impreza, Crosstrek, Ascent |
All pressures are cold-inflation specifications (tyre not driven for 3+ hours). Always verify against your vehicle's door-jamb placard or owner's manual — these are typical ranges, not universal values.
kPa to PSI Formula — Complete Reference
kPa to PSI — Complete Formula Reference
1. FUNDAMENTAL CONVERSION FACTOR (NIST exact)
1 psi = 6894.757293168 Pa (exact definition)
1 kPa = 1000 Pa
∴ 1 kPa = 1000 ÷ 6894.757293168 psi = 0.14503773773 psi
2. kPa → PSI
Formula: PSI = kPa × 0.14503773773
Simplified: PSI = kPa ÷ 6.89475729317
Example: 220 kPa → 220 × 0.14503773773 = 31.908 PSI
3. PSI → kPa (reverse)
Formula: kPa = PSI × 6.89475729317
Example: 32 PSI → 32 × 6.89475729317 = 220.632 kPa
4. kPa → Bar
Formula: bar = kPa ÷ 100 (exact)
Example: 240 kPa → 2.40 bar
5. kPa → MPa
Formula: MPa = kPa ÷ 1000 (exact)
Example: 240 kPa → 0.240 MPa
6. kPa → Atmospheres (ATM)
Formula: ATM = kPa ÷ 101.325
Example: 240 kPa → 240 ÷ 101.325 = 2.3686 ATM
7. kPa → mmHg (millimetres of mercury)
Formula: mmHg = kPa × 7.50062
Example: 240 kPa → 240 × 7.50062 = 1800.15 mmHg
8. kPa → inHg (inches of mercury)
Formula: inHg = kPa × 0.295300
Example: 240 kPa → 240 × 0.2953 = 70.87 inHg
9. kPa → Pa (Pascals)
Formula: Pa = kPa × 1000 (exact)
Example: 240 kPa → 240,000 Pa
10. BOOST PRESSURE (MAP sensor, turbocharged engines)
MAP sensors read absolute pressure (atmosphere + boost).
At sea level: atmosphere ≈ 101.325 kPa
Gauge boost kPa = MAP kPa − 101.325
Gauge boost PSI = (MAP kPa − 101.325) × 0.14504
Example: MAP = 207 kPa → Gauge = (207 − 101.325) × 0.14504 = 15.33 PSI boost
11. QUICK MENTAL ARITHMETIC
Rough approximation: PSI ≈ kPa × 0.145 (accurate within 0.03%)
Divide method: PSI ≈ kPa ÷ 6.895
Common check: 100 kPa ≈ 14.50 PSI (close to 1 atm = 14.696 PSI)What is kPa and Why Does It Appear on My Car?
kPa stands for kilopascal — the SI (International System of Units) metric unit of pressure, equal to 1,000 Pascals. It is the legal standard for pressure measurement in Canada, Australia, New Zealand, and most of Europe, which is why vehicles manufactured for these markets display tyre pressure in kPa on the door-jamb placard and in the TPMS dashboard readout. A reading of 240 kPa is not an error or an extreme pressure — it equals 34.8 PSI, which is a perfectly normal cold-inflation specification for a passenger car. The confusion arises because the number 240 looks alarmingly high to anyone accustomed to PSI values in the 30–35 range.
kPa vs PSI vs Bar — Which Unit Should You Use?
All three units describe exactly the same physical pressure — only the scale differs. PSI (pounds per square inch) is the dominant unit in the United States and is familiar to most North American drivers; typical passenger car tyre pressures fall in the 30–36 PSI range. kPa is used on door stickers in Canada, Australia, NZ, and much of Asia; the same pressures appear as 207–248 kPa. Baris common on European pressure gauges and door stickers; the same pressures appear as 2.07–2.48 bar. The relationship is fixed: 1 bar = 100 kPa = 14.504 PSI. When in doubt, use the unit printed on your vehicle's door-jamb sticker — it is always the manufacturer's intended cold-inflation pressure.
kPa to PSI for Boost Pressure — MAP Sensors Explained
In turbocharged engine tuning, MAP (Manifold Absolute Pressure) sensors report absolute pressure — the sum of atmospheric pressure plus boost. At sea level, atmosphere is approximately 101.325 kPa. If your ECU or tuning software (HP Tuners, Megasquirt, Holley EFI) shows a MAP value of 207 kPa, the actual boost above atmospheric is 207 − 101.325 = 105.675 kPa = 15.3 PSI of boost. Failing to subtract the atmospheric baseline is the most common mistake when interpreting MAP sensor kPa values in PSI. The Boost / MAP tab in this calculator performs this subtraction automatically for every row.
Cold vs Hot Tyre Pressure — Why the Measurement Matters
All manufacturer-specified tyre pressures — whether in kPa, PSI, or bar — are cold-inflation pressures, measured after the vehicle has been parked for at least 3 hours. Driving heats the air inside the tyre; a 30-minute motorway journey typically adds 4–8 PSI (28–55 kPa) to the reading. Never release pressure from a warm tyre to reach the specified value — you will be under-inflated once the tyre cools. Always check and adjust pressure when cold. Tyre pressure also drops approximately 1 PSI (6.9 kPa) for every 5°C (9°F) drop in ambient temperature, which is why seasonal pressure checks matter — especially in regions with harsh winters.
Frequently Asked Questions
All tools and information on TireCalculatorHub are for informational purposes only. Always consult your vehicle's door-jamb sticker or owner's manual for the correct tyre pressure, and a qualified professional for tyre fitment decisions. TireCalculatorHub is not liable for any damages arising from the use of this information.