Conversion to sea-level pressure Calculator

Calculates the sea-level pressure from the atmospheric pressure, temperature and altitude at the present location.

The atmospheric pressure shown on the weather map is adjusted to the equivalent sea level pressure. (1atm=1013.25hPa)
Conversion to sea-level pressure
    1. at present location:
Altitude h
    1. m
Atmospheric pressure P
    1. hPa
Temperature T
    1. °C

Sea-level pressure P0
    1.  
    2. hPa
=
    1.  
    2. atm
    Conversion to sea-level pressure
    [1-10] /84Disp-Num
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    [1]  2019/03/23 07:49   Male / 60 years old level or over / An engineer / Very /
    Purpose of use
    Calibrate BMP280 sensor, which shows 1012 at 110m on Solta island. There are nearby stations 20km away: Split (Marjan) measuring 1024.3 and Hvar island with almost the same. Reduced value was 1024.9 which may be in the precision range. Thanks.
    [2]  2019/01/10 04:21   Male / 50 years old level / An office worker / A public employee / Very /
    Purpose of use
    weather station calibration
    [3]  2019/01/04 21:25   Male / 60 years old level or over / A retired person / Very /
    Purpose of use
    Check calibration of mercury barometer
    [4]  2018/12/18 08:03   Male / 30 years old level / An office worker / A public employee / Very /
    Purpose of use
    Entering in offsets for field pressure equipment
    Comment/Request
    Thank you!
    [5]  2018/07/20 03:27   Male / 50 years old level / An engineer / Useful /
    Purpose of use
    weather calc
    Comment/Request
    using the shown formula i come up with a different answer with the same inputs. using p=1012.265, h=105, t=17.19 the website calculates 1024.84. running the formula by hand and in excel i get 1004.6341. any ideas where the error is?
    from Keisan
    We have tried it in excel, but the result was same.(1024.84)
    [6]  2018/07/08 03:39   Male / 40 years old level / An engineer / Very /
    Purpose of use
    Calibrate BME280 sensor connected to NodeMCU ESP8266 module. Used altitude data from maps https://www.daftlogic.com/sandbox-google-maps-find-altitude.htm + temperature reading from the sensor itself and compared to the closest airport data http://tgftp.nws.noaa.gov/weather/current/SBSP.html , less than 1 Km away.
    Comment/Request
    Thanks!
    [7]  2018/06/22 11:19   Male / 40 years old level / An engineer / Very /
    Purpose of use
    Calibrate BME280 Sensor sent to Blynk via MKR1000 Arduino Board
    Comment/Request
    Great tool! Thanks.
    [8]  2018/04/27 09:07   Male / 60 years old level or over / A retired people / Very /
    Purpose of use
    calibrate home weather station
    Comment/Request
    it disagreed with BOM MSLP isobars by a couple of hpa but close enough for my needs, thanks for a great conversion tool!
    [9]  2018/01/19 04:04   Male / 40 years old level / Self-employed people / Very /
    Purpose of use
    Adjust watch barometer to compare with marine weather forecast
    [10]  2018/01/14 02:33   Male / 60 years old level or over / A retired people / Very /
    Purpose of use
    Checking my conversion formula from a BME180 sensor.

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