Aviation Calculator

Offline, single file. Apple-like quick fades. Click a tile to open. Values auto-compute as you type.

C172 Performance

Short-field takeoff/landing, climb, cruise, range

Conversions

Speed, distance, temp, pressure, fuel, time & more

TOC & TOD

Top of Climb / Descent planning

ETP & PNR

Equal Time Point and Point of No Return

Meetpoint

Head-on pass: where and when

VOR Triangle

Distances from VOR using two radials

Lat/Long

Distance and True course

True Airspeed

From IAS/CAS, pressure altitude, temperature

Speed • Distance • Time

Universal solver & scenarios

Wind • Angles

WCA, heading, GS, components, limits

Altitudes

PA, DA, TA, conversions

IFR Gradients

FPM • ft/nm • angles • TOD

Pivotal Altitude

From GS or IAS + wind

60-to-1 Rule

Track error • Intercept • Time-to-fix

Clouds (Base/Top/Thickness)

CCL/LCL, top by lapse or top temp

Hydroplaning

Vp ≈ 9 · √(psi)

Time Organizer

Chain events • Buffers • Leave/Arrive

C172S Performance — Short-Field Only

Atmosphere & Runway Inputs›

Field elevation / Cruise altitude (ft)

Altimeter (inHg)

OAT (°C) — Ground / Cruise

Weight (lb)

Runway heading (°)

Wind (ddd@kt)

Runway surface & slope

Cruise RPM

Landing flaps

Atmosphere

PA: — ft

DA: — ft

ISA at PA: — °C

Wind components

Head/Tailwind: — kt

Crosswind: — kt (R/L)

Stall Speeds — 2550 lb (Power IDLE)›

Flaps

Angle of bank

Stall speed (from POH tables)

KIAS: —

KCAS: —

Notes

Power: IDLE. KIAS values approximate. Altitude loss in recovery may be up to ~230 ft.

Airspeed Calibration›

Static source

Flaps

Indicated airspeed (KIAS)

Calibrated airspeed (KCAS)

—

Conditions

Level flight / max-power descent; windows/vents closed; heat/defrost max for ALT static.

Short-Field Takeoff (10°)

Ground roll: — ft

Over 50 ft: — ft

Short-Field Landing (full)

Ground roll: — ft

Over 50 ft: — ft

Max Rate of Climb (2550 lb)

Climb speed: — KIAS

Rate of climb: — fpm

Avg through climb: — fpm

Mixture leaned above 3000 ft PA for maximum RPM.

Climb: Time, Fuel, Distance (2550 lb)

Time to climb: — min

Fuel used: — gal

Distance: — NM

Cruise (2550 lb)

% MCP: —

KTAS: — No fairings

GPH: —

Recommended lean mixture. Speed fairings assumed by POH (reduce KTAS by ~2 kt without).

Total Range (No wind)

Total Range: — NM

Fixed assumptions from POH Range Profile: 53 gal usable, 45 min reserve, recommended lean mixture, std temp, zero wind. KTAS reduced by ~2 kt if “No fairings” is checked.

Endurance (No wind)

Endurance: — hrs

Based on POH Endurance Profile: 53 gal usable, 45 min reserve, recommended lean mixture, std temp.

Note: data does not save after refreshing the page.

For planning purposes only. Verify all performance calculations with the aircraft POH and applicable FAA regulations.

Speed • Distance • Time (Universal)

Speed unit

Distance unit

Time entry style

Single-Leg Solver (enter any two) ›

Speed

Distance

Time (hh:mm or hours)

Solved

Speed: —

Distance: —

Time: —

Notes

v = d / t, d = v·t, t = d / v. Time accepts hh:mm or decimal hours.

Multi-Leg Average ›

Leg 1 distance

Leg 1 time

Leg 2 distance

Leg 2 time

Leg 3 distance

Leg 3 time

Totals

Total distance: —

Total time: —

Average speed: —

Tip

Leave any leg blank. Average speed = (Σd) / (Σt).

Relative Motion (meet/catch-up) ›

Scenario

Initial separation (distance)

Speed A

Speed B

Result

Time to meet/catch: —

Distance A travels: —

Distance B travels: —

Notes

Head-on: t = sep / (vA + vB). Chase: t = sep / (|vFast − vSlow|), distances = v•t.

Speed of Sound • Mach • ISA ΔT ›

Pressure Altitude (ft)

OAT

Temp unit

TAS (for Mach)

Mach (for TAS)

Atmosphere @ altitude

ISA temp: —

ISA deviation (ΔT): —

Speed of sound

kt: —

mph: —

km/h: —

m/s: —

Mach / TAS

Mach (from TAS): —

TAS (from Mach): —

Notes

a = √(γ·R·T). γ=1.4, R=287.05 J/kg·K, T is static air temp (K). ISA lapse = 2.0°C per 1000 ft up to ~36,000 ft, then isothermal (−56.5°C).

Conversions

Distance & Length ›

Nautical miles (NM)

Statute miles (SM)

Kilometers (km)

Meters (m)

Feet (ft)

Speed ›

Knots (kt)

Miles per hour (mph)

Kilometers per hour (km/h)

Meters per second (m/s)

Mach

Mach uses speed of sound from OAT (a = √(γ·R·T)). If OAT is empty, 15 °C is assumed.

Vertical Speed ›

Feet per minute (fpm)

Feet per second (ft/s)

Meters per second (m/s)

Temperature ›

°C

°F

K (Kelvin)

Pressure ›

inHg

hPa (mbar)

mmHg

psi

Static conversions only (no altimetry logic).

Fuel (Volume ↔ Mass ↔ Flow) ›

Fuel type (lb/US gal)

US gallons (gal)

Liters (L)

Imperial gallons (imp gal)

Pounds (lb)

Kilograms (kg)

GPH (US gal/hr)

LPH (L/hr)

PPH (lb/hr)

kg/h

Density varies with temp; defaults approximate 15 °C.

Climb/Descent Gradient ›

Groundspeed (kt)

Gradient (%)

Degrees (°)

ft / NM

m / km

fpm @ GS

1% = 60.761 ft/NM = 10 m/km. fpm = (ft/NM) × (GS kt ÷ 60).

Weight / Mass / Force ›

Pounds (lb)

Kilograms (kg)

Newtons (N)

lb↔kg is mass (1 lb = 0.45359237 kg). N is force via N = kg × 9.80665.

Time & Time Zones ›

Decimal ↔ clock time (24-hour)

Decimal hours (h)

HH:MM

Decimal minutes (min)

MM:SS

Convert local time between zones (optionally apply DST)

Local time (HH:MM)

From zone

To zone

Result

From in DST?

To in DST?

From: KJFK | To: KLAX

Offsets are standard (non-DST) unless a DST toggle is applied. Rules vary by locale; verify operational times with NOTAMs/ATC as needed.