NMR Calculator
Free
1.3.2for iPhone, iPad and more
Age Rating
NMR Calculator Screenshots
About NMR Calculator
The app evaluates the values of some basic parameters used in nuclear magnetic resonance (NMR) spectroscopy.
Nucleus
- Select an isotope with non-zero nuclear spin to find out its nuclear spin, gyromagnetic ratio, and natural abundance.
- For a chosen isotope, its Larmor frequency at a specified external magnetic field together with the Larmor frequencies of the proton and free electron will be shown.
- One can change any of the Larmor frequency, external magnetic field, and proton’s Larmor frequency to find out the other two.
- The information on the chosen isotope can be searched in Safari by pressing the "Search Web" button.
Signal
- One of the number of data points, duration, and dwell time for signal acquisition is calculated when two of them are given.
- One of the number of data points, spectral width, and frequency resolution for a NMR spectrum is calculated when two of them are given.
- One of the items can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed, and the calculation will be performed accordingly.
RF Pulse
- One of the pulse duration, flip angle, and RF amplitude of a RF pulse is calculated when two of them are given.
- The difference between the power levels of two RF pulses is presented in dB.
- One of the repetition time, relaxation time, and Ernst angle is calculated when the other two are given.
- One of the items, except "RF power relative to 1st (dB)", can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed, and the calculation will be performed accordingly.
Solution
- The concentration of a sample solution is calculated when the molecular weight and the masses of the solute and solvent water are given.
- The amount of the solute is calculated when the concentration is given.
- The name of chemical can be entered.
Info
- The data source for NMR-enabled isotopes and formulas used in the app are presented.
Nucleus
- Select an isotope with non-zero nuclear spin to find out its nuclear spin, gyromagnetic ratio, and natural abundance.
- For a chosen isotope, its Larmor frequency at a specified external magnetic field together with the Larmor frequencies of the proton and free electron will be shown.
- One can change any of the Larmor frequency, external magnetic field, and proton’s Larmor frequency to find out the other two.
- The information on the chosen isotope can be searched in Safari by pressing the "Search Web" button.
Signal
- One of the number of data points, duration, and dwell time for signal acquisition is calculated when two of them are given.
- One of the number of data points, spectral width, and frequency resolution for a NMR spectrum is calculated when two of them are given.
- One of the items can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed, and the calculation will be performed accordingly.
RF Pulse
- One of the pulse duration, flip angle, and RF amplitude of a RF pulse is calculated when two of them are given.
- The difference between the power levels of two RF pulses is presented in dB.
- One of the repetition time, relaxation time, and Ernst angle is calculated when the other two are given.
- One of the items, except "RF power relative to 1st (dB)", can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed, and the calculation will be performed accordingly.
Solution
- The concentration of a sample solution is calculated when the molecular weight and the masses of the solute and solvent water are given.
- The amount of the solute is calculated when the concentration is given.
- The name of chemical can be entered.
Info
- The data source for NMR-enabled isotopes and formulas used in the app are presented.
Show More
What's New in the Latest Version 1.3.2
Last updated on Feb 10, 2020
Old Versions
Added WatchOS extension.
- Search for an isotope with non-zero nuclear spin on your wrist!
- Select an isotope and find out its Larmor frequency for a given external magnetic field or proton Armor frequency by using the Digital Crown.
- Search for an isotope with non-zero nuclear spin on your wrist!
- Select an isotope and find out its Larmor frequency for a given external magnetic field or proton Armor frequency by using the Digital Crown.
Show More
Version History
1.3.2
Feb 10, 2020
Added WatchOS extension.
- Search for an isotope with non-zero nuclear spin on your wrist!
- Select an isotope and find out its Larmor frequency for a given external magnetic field or proton Armor frequency by using the Digital Crown.
- Search for an isotope with non-zero nuclear spin on your wrist!
- Select an isotope and find out its Larmor frequency for a given external magnetic field or proton Armor frequency by using the Digital Crown.
1.3.1
Dec 2, 2019
Supports the dark mode in iOS 13
1.3
Apr 1, 2019
New features
- The selected nucleus is remembered and will appear in the next launch
- The values entered in the 'Singal', 'RF Pulse', and 'Solution' scenes are remembered and will appear in the next launch
- The selected nucleus is remembered and will appear in the next launch
- The values entered in the 'Singal', 'RF Pulse', and 'Solution' scenes are remembered and will appear in the next launch
1.2
Nov 1, 2017
In this update,
- the names of some nuclei have been corrected,
- the vertical positions of the tabs have been made consistent, and
- the internal behavior has been improved.
- the names of some nuclei have been corrected,
- the vertical positions of the tabs have been made consistent, and
- the internal behavior has been improved.
1.1
Sep 28, 2016
Nucleus
- Added the Larmor frequency of a free electron in GHz.
- Added the "Search Web" button to allow search the selected isotope on the web.
Signal
- One of the items can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed.
Pulse
- Added a new section to calculate the Ernst angle.
- One of the items, except "RF power relative to 1st (dB)", can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed.
Info
- Added the link to the source of the electron gyromagnetic ratio: http://physics.nist.gov/cgi-bin/cuu/Value?gammae
- Added the formula for the Ernst angle.
- Added the Larmor frequency of a free electron in GHz.
- Added the "Search Web" button to allow search the selected isotope on the web.
Signal
- One of the items can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed.
Pulse
- Added a new section to calculate the Ernst angle.
- One of the items, except "RF power relative to 1st (dB)", can be deactivated by tabbing the corresponding label. While deactivated, the value will not be changed.
Info
- Added the link to the source of the electron gyromagnetic ratio: http://physics.nist.gov/cgi-bin/cuu/Value?gammae
- Added the formula for the Ernst angle.
1.0
Aug 24, 2016
NMR Calculator FAQ
Click here to learn how to download NMR Calculator in restricted country or region.
Check the following list to see the minimum requirements of NMR Calculator.
iPhone
Requires iOS 10.0 or later.
iPad
Requires iPadOS 10.0 or later.
Mac
Requires macOS 12.0 or later.
Apple Watch
Requires watchOS 6.1 or later.
iPod touch
Requires iOS 10.0 or later.
NMR Calculator supports English
