Arithmetic and geometric sequences
Find a final term and sum for an arithmetic or geometric sequence. Choose whether you repeatedly add a difference or multiply by a ratio.
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Roman numeral converter
Enter an integer or Roman numeral to convert in either direction in one box.
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Roman numeral
MMXXVI
The answer is the equivalent notation. This tool uses one common subtractive convention; other historical forms such as clock-face IIII exist but are not supported.
Equivalent2026 = MMXXVI
Worked steps
- 2026 = 1000 + 1000 + 10 + 10 + 5 + 1 = MMXXVI
Uses a common subtractive convention for 1–3999 with I, V, X, L, C, D and M; lowercase is accepted. Zero, decimals, negatives, overlines and mixed input are outside this tool. Other historical and clock-face forms such as IIII exist but are not supported here.
Method and scope
Uses one common subtractive convention for 1–3999. Lowercase is accepted.
Zero, decimals, negatives, overlines and mixed input are outside this tool. Other historical and clock-face forms such as IIII exist but are not supported here.
References:www.cs.cornell.edu reference
What this tool does
Convert between Arabic integers and a common subtractive Roman notation using one input.
What to enter
Enter an integer from 1 to 3999 or a Roman numeral using I, V, X, L, C, D and M. Lowercase works too.
Worked example
For example, enter 2026 to get MMXXVI, or enter MMXXVI to return the number 2026.
How it is calculated
For example, 1994 = 1000 + 900 + 90 + 4 = MCMXCIV. For Roman input the tool checks that the symbols match this convention.
Understanding the result
The answer is the equivalent notation in the other system; the breakdown shows its place values.
Limitations
This tool does not handle zero, decimals, negatives, overlines, mixed input, or alternative clock-face and historical forms such as IIII.