WR Quick Calc

Speed & Distance per Minute

Enter a speed in knots, mph, feet/sec, meters/sec, or km/h. All conversions update instantly.

2.00 NM/min
Nautical miles traveled each minute
120.0knots
138.1mph
12,152feet/min
3,704meters/min
2.30statute mi/min
3.70km/min
30.0sec per NM
26.1sec per statute mile

Barometer Conversion

Convert altimeter/barometric pressure between hectopascals (hPa / mb) and inches of mercury.

29.92 inHg
1013.25hPa / mb
29.92inHg

Density Altitude

Enter pressure altitude and outside air temperature. The calculator uses standard-atmosphere pressure with actual temperature to determine air density and the equivalent ISA density altitude.

Tap ± to switch between positive and negative temperature.
0 ft
Calculated density altitude
15.0 °CISA temp at PA
+0.0 °COAT vs ISA
1.000density ratio σ
0 mdensity altitude

For flight planning/performance, use the approved AFM/POH and current weather data. Humidity is not included.

TAS

Estimate TAS from calibrated airspeed (or IAS as an approximation), pressure altitude, and OAT using air-density ratio.

Tap ± to switch between positive and negative temperature.
— KTAS
—TAS mph
—TAS km/h
—density ratio σ
—TAS/CAS factor

Best accuracy requires CAS. If you enter IAS, the result does not correct for instrument/position error. This density-ratio method is a practical subsonic estimate and is not a replacement for an aircraft AFM/FMS.

Fuel Calculator

Convert aviation fuel between US gallons, liters, and pounds, or calculate how much fuel must be added for a trip.

Fuel Conversion
—US gallons
—liters
—pounds
Jet A planning density: 6.7 lb per US gallon.
Fuel Needed to Add

Enter the fuel currently on the aircraft and the total fuel required for the trip. The result is the amount to add.

Fuel currently on plane
Fuel required for trip
Enter current fuel and trip fuel.
—gallons to add
—liters to add
—pounds to add

Fuel weights use nominal planning densities. Actual fuel density varies with temperature and specification, so use aircraft/operator-approved values when precise loading data is required. All displayed results are rounded to whole numbers.

Wind Chill

Enter air temperature and wind speed. Uses the standard U.S. National Weather Service wind-chill formula.

Tap ± to switch between positive and negative temperature.
19 °F
Feels-like temperature from wind chill
19 °Fwind chill
-7 °Cwind chill
15.0wind mph
Validformula range

The standard wind-chill formula applies at 50 °F (10 °C) or colder with wind speeds of at least 3 mph.

Heat Index

Enter air temperature and relative humidity. Uses the NOAA/NWS heat-index equation.

Tap ± to switch between positive and negative temperature.
100 °F
Estimated heat index / feels-like temperature
100 °Fheat index
38 °Cheat index
60%relative humidity
Validformula range

Heat index is intended for warm, humid conditions in shade/light wind. Direct sun can make conditions feel hotter.

Fahrenheit ↔ Celsius

Enter a temperature in either Fahrenheit or Celsius. Negative temperatures are supported.

Tap ± to switch between positive and negative temperature.
0.0 °C
32.0 °FFahrenheit
0.0 °CCelsius

Time Zone Converter

UTC now —
1
FROM Where is the entered time?
— —
Interpreted as —
2
TO Where do you want the converted time?
— —
CONVERTED TIME — — —
Also show
UTC — —
Local — —
Dallas — —

Search accepts city names, many airport codes, UTC, and “local.” Time-zone and daylight-saving rules come from your phone/browser.

Date Calculator

Add or Subtract From a Date
—
Calculated date
Date & Duration

Calculate the interval between two dates and times.

— Saturdays + Sundays in the selected period
—
Calendar difference
—total years (avg)
—total months (avg)
—total weeks
—total days
—total hours
—total minutes
—total seconds
—direction

Calendar difference uses whole calendar years and months first. Decimal years/months are averages so you can compare the interval as one number.

Loan Calculator

Calculate principal and interest, estimated monthly housing cost, payoff with extra payments, interest savings, and a full amortization schedule.

$
% per year
years
months
$
$
per year
$
per year
$
per year
% per year
$
Used for estimated down payment and loan-to-value.
Property tax, insurance, HOA/fees and PMI are added to the monthly-cost estimate but do not change the principal-and-interest amortization. PMI is estimated as the entered annual percentage of the original loan amount and does not automatically cancel.
Required monthly P&I —
Tax + insurance + fees + PMI —
Estimated monthly housing —
Monthly paid with extra —
—estimated down payment
—loan-to-value
Standard loanWith extra
Total payments——
Total interest——
Total P&I paid——
Interest saved—
Payments saved—
Paid off sooner—
Show amortization schedule
# Payment Principal Interest Extra Balance