How to use the base conversion calculator
Prepare the values for this calculation
Convert an exact integer between bases 2 through 36. Use the formula below to check that it answers your question. Read the input units before transferring figures from a statement, measurement or dataset.
Enter and check each input
- Integer value: replace the example with your text, keeping the format described in the input table.
- Source base: enter a value at least 2 and no more than 36 and a whole number. Use the unit named in the label or selected above. Do not leave this required field blank.
- Destination base: enter a value at least 2 and no more than 36 and a whole number. Use the unit named in the label or selected above. Do not leave this required field blank.
The input table gives a complete example. Keep units and time periods consistent across related fields.
Calculate and resolve any input error
Choose Calculate after entering the values. Changes also update the answer after a short pause. If an error appears, follow its message, correct the field and calculate again. Reset restores the example values.
Interpret the answer
Check Converted integer first. With the unchanged example inputs, it is 45. Compare the additional metrics with the primary result; each has its own label and unit.
Compare and keep a useful result
For a controlled comparison, keep every other example input unchanged and change Source base from 16 to 18. The resulting Converted integer is 49. This illustrates the equation’s response to that input, rather than a forecast of real events.
Read the chart’s axis labels and data table. A scenario curve changes one stated input while holding the others fixed; it does not add external observations. Use Download graph to save an available chart as a PNG.
Use Copy result or Download CSV to keep the answer. Share tool shares the page address without placing your input values in the URL. Recheck inputs and assumptions before using the result for a decision.
Base Conversion Calculator formula
Digits are parsed positionally in the source base and re-expressed in the destination base using exact integer arithmetic.
Inputs and units
| Input | Format / range | Example |
|---|---|---|
| Integer value | Number | 2D |
| Source base | minimum 2; maximum 36; whole number | 16 |
| Destination base | minimum 2; maximum 36; whole number | 10 |
Worked example
Using the example inputs above, the converted integer is 45.
- Converted integer
- 45
- Decimal value
- 45
Results and assumptions
The output uses the converted integer convention and formula shown above. Match the entered units and source assumptions when comparing results.
Fix an input or unexpected result
Source base is required. Enter source base using the format and bounds in the input table. Zero and an empty field are different: use zero only if it is allowed and represents your data.
If your answer differs from the example, choose Reset and compare every field, including selected units and options. Check percentage versus decimal entry and whether values describe the same period. Round only the final displayed answer when reproducing the formula.
If a discrepancy remains, report the calculator issue with the page address, non-sensitive example inputs, actual result, expected result and a reference for your calculation.