Calculator Inputs
Formula used
The calculator uses the selected physics relation. It also builds row based calculated column expressions for the same relation.
| Option | Formula | Typical unit |
|---|---|---|
| Kinetic energy | KE = 0.5 × m × v² | J |
| Momentum | p = m × v | kg·m/s |
| Force | F = m × a | N |
| Pressure | P = F ÷ A | Pa |
| Density | ρ = m ÷ V | kg/m³ |
| Mechanical power | P = W ÷ t | W |
| Electrical power | P = V × I | W |
| Heat energy | Q = m × c × ΔT | J |
| Wave speed | v = f × λ | m/s |
How to use this calculator
- Select the physics formula needed for your report column.
- Enter sample values to preview the calculated result.
- Set the table name and output column name.
- Enter the source column names from your imported data.
- Press submit to view the result above the form.
- Copy the DAX or query step into your model workflow.
- Use the CSV or PDF buttons to save the summary.
Example Data Table
| Test | Mass_kg | Velocity_mps | Force_N | Area_m2 | Calculated example |
|---|---|---|---|---|---|
| Cart A | 12 | 8 | 150 | 0.75 | KE = 384 J |
| Cart B | 9 | 11 | 210 | 1.20 | KE = 544.5 J |
| Plate C | 16 | 5 | 320 | 0.80 | Pressure = 400 Pa |
Calculated Columns for Physics Models
Physics reports often need repeatable columns. A sensor table may store mass, time, distance, voltage, or temperature. A calculated column turns those raw fields into a value used by visuals. The value can be energy, pressure, density, power, or another physics measure. This tool helps build that column with less guesswork. It also shows the numeric result from sample values. That preview helps check units before the expression enters a model.
Why Column Logic Matters
A column expression runs for every row. Each row must use the right fields. Small mistakes can grow across thousands of records. A missing unit conversion can change a chart by a large factor. A blank value can also break a trend. Good column logic should handle blanks, use clear names, and return a stable number. The generated expressions use protective number conversion. They also keep the physics formula visible. This makes review easier for analysts and teachers.
Physics Use Cases
The calculator supports common classroom and engineering measures. Kinetic energy uses mass and velocity. Momentum uses the same inputs, but multiplies them directly. Force uses mass and acceleration. Pressure divides force by area. Density divides mass by volume. Mechanical power divides work by time. Electrical power can use voltage and current. Heat energy uses mass, specific heat, and temperature change. Wave speed uses frequency and wavelength. These options cover many lab sheets and dashboards.
DAX and Query Steps
Power BI models can create columns in different places. A DAX calculated column belongs to the data model. A query step is created during data preparation. Each approach has a purpose. Query steps are useful for cleaning and shaping data before loading. DAX columns are useful when the model needs row level logic after import. This calculator provides both expressions. You can choose the one that fits your workflow. Keep names consistent across tables. Clear names reduce editing later.
Unit Control and Uncertainty
Physics data is only useful when units are understood. The result line shows the expected unit for each formula. Decimal precision can be changed for reporting. The uncertainty option estimates an upper and lower range. It is not a full error propagation system. It is a simple tolerance check. Use it when source readings have an estimated percentage error. For formal lab reports, enter measured errors separately and document the method.
Better Reporting Practice
A strong calculated column is readable. It should have a clear name, a known unit, and a tested result. Always compare the preview result with a manual calculation. Then paste the expression into the chosen editor. Refresh the report and check a few rows. If the output looks wrong, inspect the source columns first. Most issues come from blanks, text values, or mixed units. Clean data first. Then create the final physics column. Save the expression notes with each published model version for audits.
FAQs
What does this calculator create?
It creates a physics result from sample values. It also generates a DAX calculated column and a Power Query M step using your chosen source column names.
Can I use it for imported lab data?
Yes. Enter the same column names used in your imported lab table. Then copy the generated expression into the correct modeling area.
Which formulas are included?
It includes kinetic energy, momentum, force, pressure, density, mechanical power, electrical power, resistive power, heat energy, wave speed, potential energy, and work.
What is the uncertainty range?
The range applies your chosen percentage above and below the sample result. It is a quick tolerance estimate, not a complete lab error propagation method.
Why are column names requested?
The generated expressions need real source fields. Column names let the tool build references that match your model or query table.
Should I use DAX or a query step?
Use a query step when shaping data before loading. Use DAX when you need row logic inside the data model after loading.
Can blank values affect results?
Yes. Blank or text values can cause wrong outputs. The generated M step uses number conversion checks to reduce common row errors.
Can I change the decimal places?
Yes. Use the decimal precision field. It changes the displayed sample result and exported summary values.
Does this convert units automatically?
No. Enter values using the expected units shown beside each input. Convert source data first when your table uses mixed units.
Can I save the output?
Yes. After submitting the form, use the CSV or PDF buttons to download a compact result summary and generated expressions.
Why is the result shown above the form?
The layout keeps the computed answer visible immediately after submission. It helps users review formulas before changing more input fields.