Diamond DA40 Weight & Balance Calculator
Calculate weight and balance for the Diamond DA40 Diamond Star, a 4-seat single-engine piston with a 2,535 lb maximum takeoff weight. Enter your loading and fuel to plot zero-fuel, takeoff, and landing CG on the Diamond DA40's approved envelope — in kg or lbs, with an emailed PDF worksheet. No signup required.
1. Select Aircraft Type
Choose your aircraft type, then update the empty weight and arm with your specific aircraft's data.
Diamond DA40 Diamond Star with Lycoming IO-360-M1A (180 HP). Fuel capacity: 40.2 gallons usable. Composite airframe. Verify empty weight and moment from your specific aircraft's weight and balance record.
2. Enter Loading & Fuel
Enter weights for each station and your fuel plan. Results update in real time.
Aircraft Empty Weight
Enter values from your specific aircraft's official weight and balance record. Default values shown are approximate.
Which two do you know? The third is calculated.
On board at start of takeoff roll
Burned en route (takeoff → landing)
Remaining at landing
Ramp fuel = takeoff + taxi. Burned before takeoff.
3. Results
Zero-fuel, takeoff and landing weights and CG — updated instantly.
WITHIN LIMITS
All flight phases within weight and CG limits
| Phase | Weight (lbs) | Limit | CG (in) | Env. |
|---|---|---|---|---|
| ZFWZero Fuel Weight | 1925 | — | 96.28 | |
| RAMPRamp Weight | 2165 | 2546 | 96.87 | — |
| TOWTakeoff Weight | 2159 | 2535 | 96.86 | |
| LWLanding Weight | 2019 | 2535 | 96.53 |
| Item | Weight (lbs) | Arm (in) | Moment |
|---|---|---|---|
| Empty Weight | 1755 | 96.30 | 169007 |
| Front Seats (Pilot + Passenger) | 170 | 96.10 | 16337 |
| Rear Seats | 0 | 124.00 | 0 |
| Baggage | 0 | 144.00 | 0 |
| Zero Fuel Weight | 1925 | 96.28 | 185344 |
| Takeoff Fuel | 234 | 101.60 | 23774 |
| Takeoff Weight | 2159 | 96.86 | 209118 |
4. CG Envelope
Zero-fuel (ZFW), takeoff (TOW) and landing (LW) plotted against the approved envelope. The dashed line shows how the CG travels as fuel burns off.
5. Get the Worksheet
We'll email you a printable PDF worksheet of this calculation.
Email me this worksheet (PDF)
Get this Diamond DA40 Diamond Starweight & balance calculation as a printable PDF — fuel plan, ZFW/TOW/LW, and the CG envelope.
Diamond DA40 weight and balance data
The station arms, CG envelope, and weight limits this calculator uses for the Diamond DA40. These are representative type values — always confirm against your specific aircraft's POH and individual weight and balance record.
- Max takeoff weight
- 2,535 lb
- Max ramp weight
- 2,546 lb
- CG range (normal)
- 92.1 – 101.6 in aft of datum
- Seats
- 4
- Usable fuel
- 40 gal (240 lb)
| Loading station | Arm (in) | Max weight (lb) |
|---|---|---|
| Front Seats (Pilot + Passenger) | 96.1 | 400 |
| Rear Seats | 124.0 | 400 |
| Baggage | 144.0 | 66 |
| Fuel (40 gal max) | 101.6 | 240 |
Data sources
The Diamond DA40 reference data above is drawn from the following primary sources, last checked on 2026-06-20.
- EASA TCDSEASA Type Certificate Data Sheet A.022
European Union Aviation Safety Agency
Original type certificate for the DA40 series; confirms CG limits, maximum weights, and loading datum for the Diamond Star.
Federal Aviation Administration
US type certificate for the DA40; confirms 2,535 lb maximum takeoff weight and CG range. Search TCDS A47CE (Diamond DA40) on the FAA Dynamic Regulatory System.
Diamond Aircraft Industries
Loading arrangement (front seats +96.1, rear seats +124.0, baggage +144.0, fuel +101.6 in) and the approved CG envelope.
Diamond DA40Weight & Balance FAQ
How do I calculate weight and balance for the Diamond DA40 Diamond Star?
Start with your specific aircraft's basic empty weight and empty-weight arm from its individual weight and balance record — not a generic POH number. Add each loading station (pilot, passengers, baggage, fuel) multiplied by its arm to get the moment, total the weights and moments, then divide total moment by total weight for the CG. This calculator has the Diamond DA40's station arms and CG envelope built in, so you only enter weights and fuel and it plots the result on the approved envelope. Always confirm against your aircraft's POH before flight.
What is the maximum takeoff weight of the Diamond DA40 Diamond Star?
The Diamond DA40 has a maximum takeoff weight of 2,535 lb and a maximum ramp weight of 2,546 lb, leaving roughly 11 lb for taxi and run-up fuel. These are representative type values — verify the limits for your specific airframe and equipment in its POH and weight and balance record.
What is the CG range of the Diamond DA40 Diamond Star?
The normal-category center-of-gravity envelope for the Diamond DA40 runs from about 92.1 in to 101.6 in aft of datum, with the forward limit typically moving aft as weight increases. Loading outside this range degrades stability and control, so this calculator plots your zero-fuel, takeoff, and landing CG against the envelope and flags any point that falls outside it. Always verify against the CG chart in your aircraft's POH.
How much fuel does the Diamond DA40 Diamond Star hold and what does it weigh?
This Diamond DA40 profile uses 40 gallons of usable fuel, which at the standard 6 lb per US gallon for avgas weighs about 240 lb. The calculator lets you plan takeoff, trip, and reserve fuel so you can check the center of gravity at zero-fuel, takeoff, and landing — the CG shifts as fuel burns off. Confirm your aircraft's usable fuel and fuel arm in its POH.
This Diamond DA40weight and balance calculator is provided for educational and reference purposes only. Preset station arms, CG envelopes, and weight limits are representative type values and may not match your specific aircraft. Always refer to your aircraft's official POH/AFM and individual weight and balance record for authoritative data, and confirm the loading is within limits before every flight. For regulatory guidance, see the FAA Weight & Balance Handbook (FAA-H-8083-1). Built by Aviatize — flight school management software.