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1 DEM to ONEGerman Deutsche Mark → Harmony
On 2026-10-25, 1 German Deutsche Mark (DEM) = 5.5795 Harmony (ONE) at the mid-market rate. Conversely, 1 ONE = 0.1792 DEM. Over the last 30 days the DEM/ONE rate moved between 3.6657 and 5.6479, a change of +52.21%.
This page shows the live mid-market rate from German Deutsche Mark (DEM) to Harmony (ONE), its history over the past year and ready-made conversion tables. Rates are updated twice a day; banks and card networks usually add a margin on top.
DEM/ONE exchange rate chart
DEM/ONE went from 3.9862 on Sep 26, 2026 to 5.5795 on Oct 25, 2026 (+39.97 %). Highest: 5.6479 (Oct 23, 2026); lowest: 3.7342 (Sep 27, 2026).
DEM/ONE exchange rate analysis
Over the last 30 days the DEM/ONE rate rose sharply (+52.21%): the DEM strengthened markedly against the ONE. Over the past 12 months it ranged from 3.6657 (2026-09-25) to 1,266.72 (2025-12-06), with an average of 262.71. Today's rate is 97.88% below its one-year average: 1 DEM buys fewer ONE than usual. Day-to-day movements are large (average daily change of 3.10%), so the amount received can vary noticeably from one day to the next. The largest daily move of the last 30 days was +10.27% on 2026-10-15.
| Period | Date | 1 DEM = | Change |
|---|---|---|---|
| 1 week ago | 5.6236 ONE | -0.78% | |
| 1 month ago | 3.6657 ONE | +52.21% | |
| 1 year ago | 88.2870 ONE | -93.68% |
DEM/ONE · last 10 days
| Date | 1 DEM = | 1 ONE = |
|---|---|---|
| 5.5795 ONE | 0.1792 DEM | |
| 5.5653 ONE | 0.1797 DEM | |
| 5.6479 ONE | 0.1771 DEM | |
| 5.5990 ONE | 0.1786 DEM | |
| 5.5598 ONE | 0.1799 DEM | |
| 5.6442 ONE | 0.1772 DEM | |
| 5.5689 ONE | 0.1796 DEM | |
| 5.6236 ONE | 0.1778 DEM | |
| 5.4349 ONE | 0.184 DEM | |
| 5.4201 ONE | 0.1845 DEM |
German Deutsche Mark to Harmony
Harmony to German Deutsche Mark
Frequently asked questions
How much is 1 DEM in ONE today?
1 German Deutsche Mark is worth 5.5795 Harmony at the mid-market rate of 2026-10-25. 1 Harmony is worth 0.1792 German Deutsche Mark.
How much is 100 DEM in ONE?
100 DEM = 557.95 ONE, and 100 ONE = 17.9227 DEM (rate of 2026-10-25).
How has the DEM to ONE rate changed over the last month?
Over 30 days the rate went from 3.6657 to 5.5795 (+52.21%). The 30-day high was 5.6479 and the low was 3.6657.
How has the DEM to ONE rate changed this week?
One week ago 1 DEM was worth 5.6236 ONE; today it is worth 5.5795 ONE (-0.78%).
What was the best DEM to ONE rate in the past year?
The highest rate of the past 12 months was 1 DEM = 1,266.72 ONE on 2025-12-06; the lowest was 3.6657 ONE on 2026-09-25.
Where does this exchange rate come from?
XeConvert publishes daily mid-market reference rates aggregated from public market data and central bank sources. Banks, card issuers and exchange offices add a margin, so the rate you actually get may be slightly different.