Chemical Shift Hz to PPM Converter
ActualsignedchemicalshiftHz/referenceHz×1e6ppm, magnitudes matched reference, no assumed field/nucleus and sign retained.
Description
A chemical shift in ppm expresses a signed frequency difference relative to a specified resonance frequency.
A chemical shift in ppm expresses a signed frequency difference relative to a specified resonance frequency.1
This tool converts matched hertz measurements into ppm without assuming a nucleus or magnetic field.
When to use Chemical Shift Hz to PPM Converter
This tool converts matched hertz measurements into ppm without assuming a nucleus or magnetic field.
How to use Chemical Shift Hz to PPM Converter and how it works
- Prepare signed chemical shift hz, reference resonance hz, using the input definitions and matching units below.
- Enter the required fields and run Chemical Shift Hz to PPM Converter.
- Read result.value using the units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualSignedChemicalShiftHz | Actual Signed Chemical Shift Hz. Use the units and matching context stated in the calculation below. | number | Required; finite; other constraints below |
| actualReferenceResonanceHz | Actual Reference Resonance Hz. Use the units and matching context stated in the calculation below. | number | Required; strictly positive; finite; other constraints below |
Accept finite signed shift in Hz and require positive matched reference resonance frequency in Hz. Return 1e6*shift/reference as signed ppm. No nucleus, field or frequency reference is selected.
shiftPpm=1000000*shiftHz/referenceHz Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Signed chemical shift in ppm. | number |
{
"input": {
"actualSignedChemicalShiftHz": 20,
"actualReferenceResonanceHz": 10000000
},
"output": {
"result": {
"value": 2
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use STIR Inversion Time Calculator for a complementary operation: Ideal inversion recovery nulls a component at a time related to its longitudinal relaxation constant.
Use Fat Saturation Frequency Offset Calculator for a complementary operation: A chemical shift in ppm becomes a frequency offset when multiplied by a matched resonance-frequency basis.
References
-
Chemical Shift Hz to PPM Converter — tool.io
Similar or alternative tools
- STIR Inversion Time Calculator
Ideal inversion recovery nulls a component at a time related to its longitudinal relaxation constant.
- Fat Saturation Frequency Offset Calculator
A chemical shift in ppm becomes a frequency offset when multiplied by a matched resonance-frequency basis.