Aviation Weight & Mass Converter: kg, lbs, tonnes
Convert aircraft empty weight, payload, fuel mass, and baggage instantly across kilograms, pounds, tonnes, ounces, grams, and stones.
Aviation Weight & Mass Converter
How to Convert Aviation Weight and Mass Units
Weight and balance calculations, payload planning, and fuel load dispatching require precise conversions between metric and imperial weight standards. Operating commercial or general aviation aircraft involves tracking mass across six primary units:
- Kilograms (kg): The international metric standard for calculating aircraft operating weights, passenger baggage, and fuel mass outside the US.
- Pounds (lb): The primary aviation unit used in North America for tracking Maximum Takeoff Weight (MTOW), Center of Gravity (CG) limits, and aircraft basic empty weight.
- Tonnes (t): Metric tons (1,000 kg) used to define heavy transport aircraft weight categories, maximum payload limits, and large-scale cargo manifest totals.
- Grams (g): Utilized primarily in aviation maintenance engineering for small components, electronic hardware, or precision chemical applications.
- Ounces (oz): Imperial unit used for tracking small equipment details, structural fasteners, or tiny fluid capacities in system components.
- Stones (st): A traditional British unit of mass (1 stone = 14 pounds) occasionally referenced in historical logs or regional passenger weight averages.
Aviation Weight & Mass Applications
Accurate mass calculations are a legal and safety requirement for flight verification, structural loading limits, and climb performance modeling.
| Application | Primary Units Used | Operational Context |
| Aircraft Operating Weights | Kilograms / Pounds | Calculating Basic Empty Weight (BEW), Zero Fuel Weight (ZFW), and Maximum Takeoff Weight (MTOW). |
| Fuel Mass Tracking | Pounds / Kilograms | Converting fuel volume to mass based on density variations. Crucial for matching flight computer inputs. |
| Payload & Baggage Limits | Kilograms / Pounds | Verifying passenger luggage weights, cargo pallet loading, and ensuring structural compartment floor limits are not exceeded. |
| Precision Hardware Weights | Grams / Ounces | Component tracking in maintenance overhauls, balance adjustments for control surfaces, and structural repair limits. |
Complete Mass Conversion Formulas
Kilograms (kg) Conversions
- Kilograms to Grams: Grams = kg × 1,000
- Kilograms to Pounds: Pounds = kg × 2.20462
- Kilograms to Ounces: Ounces = kg × 35.274
- Kilograms to Tonnes: Tonnes = kg × 0.001
- Kilograms to Stones: Stones = kg × 0.157473
Grams (g) Conversions
- Grams to Kilograms: Kilograms = g / 1,000
- Grams to Pounds: Pounds = g × 0.00220462
- Grams to Ounces: Ounces = g × 0.035274
- Grams to Tonnes: Tonnes = g / 1,000,000
- Grams to Stones: Stones = g × 0.000157473
Pounds (lb) Conversions
- Pounds to Kilograms: Kilograms = lb × 0.453592
- Pounds to Grams: Grams = lb × 453.592
- Pounds to Ounces: Ounces = lb × 16
- Pounds to Tonnes: Tonnes = lb × 0.000453592
- Pounds to Stones: Stones = lb × 0.0714286
Ounces (oz) Conversions
- Ounces to Kilograms: Kilograms = oz × 0.0283495
- Ounces to Grams: Grams = oz × 28.3495
- Ounces to Pounds: Pounds = oz × 0.0625
- Ounces to Tonnes: Tonnes = oz × 0.00002835
- Ounces to Stones: Stones = oz × 0.00446429
Tonnes (t) Conversions
- Tonnes to Kilograms: Kilograms = t × 1,000
- Tonnes to Grams: Grams = t × 1,000,000
- Tonnes to Pounds: Pounds = t × 2,204.62
- Tonnes to Ounces: Ounces = t × 35,274
- Tonnes to Stones: Stones = t × 157.473
Stones (st) Conversions
- Stones to Kilograms: Kilograms = st × 6.35029
- Stones to Grams: Grams = st × 6,350.29
- Stones to Pounds: Pounds = st × 14
- Stones to Ounces: Ounces = st × 224
- Stones to Tonnes: Tonnes = st × 0.00635029
Weight & Mass Quick Reference Matrix
| From Unit | To kg | To Grams (g) | To Pounds (lb) | To Ounces (oz) | To Tonnes (t) | To Stones (st) |
| 1 kg | 1 | 1,000 | 2.20462 | 35.274 | 0.001 | 0.157473 |
| 1 g | 0.001 | 1 | 0.00220462 | 0.035274 | 0.000001 | 0.000157473 |
| 1 lb | 0.453592 | 453.592 | 1 | 16 | 0.000453592 | 0.0714286 |
| 1 oz | 0.0283495 | 28.3495 | 0.0625 | 1 | 0.00002835 | 0.00446429 |
| 1 t | 1,000 | 1,000,000 | 2,204.62 | 35,274 | 1 | 157.473 |
| 1 st | 6.35029 | 6,350.29 | 14 | 224 | 0.00635029 | 1 |