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Nm to Foot Pounds Torque Converter
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Free nm to ft-lbs Converter

Newton-meters (Nm) to Foot-pounds (ft‑lbs) Converter

Convert newton meters to foot pounds (ft-lbs) instantly — or reverse ft-lbs back to Nm. Bidirectional, live as you type, and built on NIST-verified constants — trusted by mechanics, engineers, and DIY enthusiasts worldwide.

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Torque Conversion Tool

Type in Nm or ft-lb — the other field updates instantly.

4
From Newton-meters
Nm

Newton-meters → foot-pounds

From Foot-pounds
ft-lb

Foot-pounds → Newton-meters

1 Nm = 0.7375621493 ft-lb  ·  1 ft-lb = 1.3558179483 Nm

Current Nm
—
Current ft-lb
—
Formula used
ft-lb = Nm × 0.7375621493
Live Result

Enter a value in the calculator to see a summary here.

Nm
—
ft-lb
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Popular nm to ft‑lbs Conversions

Click any value to load it in the calculator above

8 quick values

Need a value not listed? Use the calculator above — any Nm or ft-lbs value supported. See all 27 common values in the reference chart below.

Quick Tips

› Nm is metric (SI); ft-lb is imperial — confirm which system your manual uses before converting.

› Set higher decimals for engineering specs; fewer for quick workshop estimates.

› Safety-critical fasteners always need verified specs from your OEM service manual.

› Bookmark this page — works on any device, no account or install needed.

Exact Constants
1 Nm =
0.7375621492772656 ft‑lb
1 ft‑lb =
1.3558179483314004 Nm

How to Convert Newton Meters to Foot Pounds (ft-lbs)

Newton-meters (Nm) and foot-pounds (also written ft-lbs or lb ft) both measure torque — the same physical quantity — but in different unit systems. The metric SI system uses Nm; the imperial system uses ft-lbs. When you need to convert newton meters to foot pounds for an automotive spec or engineering task, using the exact constant — not a rounded approximation — prevents errors that can damage components or compromise safety.

Nm → ft-lb
ft-lb = Nm × 0.7375621493
Example: 200 Nm = 147.512 ft-lb
ft-lb → Nm
Nm = ft-lb × 1.3558179483
Example: 100 ft-lb = 135.582 Nm

How to Use This Converter

  1. 1 Enter a value: Type in the Nm field to get ft-lb, or type in the ft-lb field to get Nm. Results appear instantly — no submit button needed.
  2. 2 Adjust precision: Use the Decimals control (top-right of the tool) to set output precision from 0 to 12 decimal places. Match your service manual's required accuracy.
  3. 3 Copy the result: Click Copy Nm or Copy ft-lb to copy either result directly to your clipboard — ready to paste into documents, spreadsheets, or work orders.
  4. 4 Clear and restart: Hit Clear to reset both fields and start a fresh conversion.
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Safety Note

Safety-critical fasteners — cylinder head bolts, wheel lug nuts, brake caliper bolts — require torque within tight tolerances. Under-torque causes loosening under load; over-torque strips threads or warps mating surfaces. Always verify results against your manufacturer's official service manual before applying torque to critical components.

About the Conversion Constants

The factor 1.3558179483 Nm per ft-lb is derived from exact SI definitions: 1 foot = 0.3048 m exactly, and 1 pound-force = 0.45359237 kg × 9.80665 m/s² exactly. Multiplying these gives 1 ft-lb = 1.3558179483314004 Nm — a constant used in NIST reference data and engineering standards worldwide. This tool uses the full 16-significant-figure value internally for maximum accuracy.

For informational and educational use. Always verify torque against official manufacturer or service-manual specifications for safety-critical applications.

Common Vehicle Torque Specs
Wheel / lug nuts
100–130 Nm / 74–96 ft-lb
Spark plugs
20–30 Nm / 15–22 ft-lb
Engine head bolts
80–110 Nm / 59–81 ft-lb
Caliper bolts
35–45 Nm / 26–33 ft-lb
Oil drain plug
25–35 Nm / 18–26 ft-lb
Axle / hub nut
150–300 Nm / 111–221 ft-lb

Nm → ft‑lb Reference Chart

27 common torque values across 4 categories — precision to heavy-duty.

27 values 4 categories
🔩 Light Fasteners 5 values
0.5 – 10 Nm · Precision electronics
Nm ft‑lb
0.5 0.3688
1 0.7376
2 1.4751
5 3.6878
10 7.3756
🔧 Workshop Fasteners 7 values
20 – 80 Nm · General automotive
Nm ft‑lb
20 14.751
25 18.439
30 22.127
40 29.502
50 36.878
75 55.317
80 59.005
⚙️ Structural Fasteners 9 values
90 – 200 Nm · Heavy automotive
Nm ft‑lb
90 66.381
100 73.756
120 88.507
130 95.883
140 103.26
150 110.63
160 118.01
180 132.76
200 147.51
🏗️ Heavy Components 6 values
250 – 500 Nm · Trucks & industrial
Nm ft‑lb
250 184.39
300 221.27
350 258.15
400 295.02
450 331.9
500 368.78
Internal precision self-tests
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    Built for Accuracy and Speed

    Every detail is engineered to give you fast, precise torque conversions — without the friction.

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    Instant Live Results

    Results appear the moment you type. No delays, no submit button, no page reloads — both fields sync bidirectionally in real time.

    🎯

    NIST-Verified Constants

    Uses exact SI-defined constants to 16 significant figures: 1 Nm = 0.7375621492772656 ft-lb — the same values used in professional engineering software.

    🔄

    True Bidirectional

    Type Nm and get ft-lb, or type ft-lb and get Nm. No mode switching — the converter works in both directions simultaneously.

    🔢

    Adjustable Precision

    Control output from 0 to 12 decimal places. Match the exact precision required by your service manual, engineering document, or quality spec.

    📋

    One-Click Copy

    Copy either result to your clipboard instantly. Paste directly into spreadsheets, work orders, service reports, or engineering documents.

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    Zero Friction

    No account. No ads. No install. No fees. Open the page and convert — on any device, any browser, anywhere in the world.

    Who It's For

    Trusted Across Industries

    From automotive workshops to engineering labs — wherever precise torque matters, this tool delivers.

    🔧
    Automotive

    Mechanics & Technicians

    Convert service-manual torque specs between Nm and ft-lb instantly. Whether your manual lists metric or imperial values, get the exact figure for your torque wrench — right at the workbench.

    Common: wheel nuts (100–130 Nm), brake calipers (35–45 Nm), oil drain plugs (25–35 Nm)

    ⚙️
    Engineering

    Mechanical Engineers

    Validate design specs across unit systems. Convert between SI and imperial during design reviews, R&D documentation, FEA reports, and cross-regional technical handover.

    Commonly needed for: fastener schedules, assembly instructions, and tolerance specs

    🏭
    Manufacturing

    Manufacturing & Quality Assurance

    Ensure assembly-line fastener torque specs are correctly converted across metric and imperial tooling. Maintain consistent quality and traceability across production sites using different unit standards.

    Critical for: ISO certification, torque audit documentation, and cross-plant standardization

    🛠️
    DIY

    DIY Enthusiasts

    Working on your car, motorcycle, bicycle, or home machinery? Get the correct torque spec regardless of which unit system your tools or manual use. No guesswork, no rounding errors.

    Great for: home garage projects, bike maintenance, engine swaps, suspension work

    FAQ

    Frequently Asked Questions

    Everything you need to know about Nm and ft-lb torque conversion.

    How do I convert Nm to ft-lb?
    Multiply your Newton-meter value by 0.7375621493.
    Formula: ft-lb = Nm × 0.7375621493
    Example: 100 Nm × 0.7375621493 = 73.756 ft-lb.
    The live calculator above applies this exact constant the moment you type.
    What is 20 nm in ft-lbs?
    20 Nm = 14.751 ft-lbs (20 × 0.7375621493 = 14.751 ft-lbs). This torque is typical for spark plugs on compact and smaller-displacement engines. Use the calculator above for any other Nm value.
    What is 25 nm to ft-lbs?
    25 Nm ≈ 18.439 ft-lbs (25 × 0.7375621493 ≈ 18.439 ft-lbs). A common specification for oil drain plugs and spark plugs on many passenger cars. Always verify against your vehicle's OEM service manual before applying torque.
    What is 100 Nm in ft-lb?
    100 Nm = 73.756 ft-lb (100 × 0.7375621493 = 73.756 ft-lb). This is a common torque range for spark plugs (20–30 Nm) and smaller engine fasteners. Use the calculator above for any other value with adjustable decimal precision.
    What is 150 Nm in ft-lb?
    150 Nm ≈ 110.634 ft-lb (150 × 0.7375621493 ≈ 110.634 ft-lb). This range is typical for caliper bracket bolts, suspension components, and some drivetrain fasteners.
    What is 200 Nm in ft-lb?
    200 Nm ≈ 147.512 ft-lb (200 × 0.7375621493 ≈ 147.512 ft-lb). This is a typical specification for wheel lug nuts on passenger cars and various engine fasteners.
    What is 1 Nm in ft-lb?
    1 Nm = 0.7375621492772656 ft-lb — exact to 16 significant figures. For most practical uses, round to 0.7376 ft-lb. This is the core constant that drives all calculations on this site.
    How do I convert ft-lb to Nm?
    Multiply your foot-pound value by 1.3558179483.
    Formula: Nm = ft-lb × 1.3558179483
    Example: 50 ft-lb × 1.3558179483 = 67.791 Nm.
    Type in the ft-lb field above — the Nm equivalent appears instantly.
    What is 70 ft-lb in Nm?
    70 ft-lb ≈ 94.907 Nm (70 × 1.3558179483 ≈ 94.907 Nm). This is a common torque spec for wheel lug nuts on compact vehicles when specs are listed in ft-lb.
    What is 100 ft-lb in Nm?
    100 ft-lb ≈ 135.582 Nm (100 × 1.3558179483 ≈ 135.582 Nm). A frequently encountered value for hub nuts, driveshaft bolts, and heavier suspension components.
    What is the difference between Nm and ft-lb?
    Both measure torque — rotational force. Nm (Newton-meters) is the SI metric unit (1 N of force at 1 m from the pivot). ft-lb (foot-pounds) is the imperial unit (1 lbf at 1 ft from the pivot). European and Japanese manufacturers typically use Nm; many American manufacturers use ft-lb. The conversion ratio is exactly 1 ft-lb = 1.3558179483 Nm.
    Why does precise torque conversion matter?
    Torque precision is safety-critical for fasteners on brakes, wheels, and engine components. Under-torque allows fasteners to loosen under vibration and load. Over-torque stretches or snaps bolts and strips threads. Using exact conversion constants — not rounded approximations — and always cross-referencing with the OEM service manual is the only safe approach.

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