Troedfeddi
Yn 1959, diffiniwyd gan y cytundeb llathau a phwysau rhyngwladol (rhwng yr Unol Daleithiau a gwledydd y Gymanwlad) bod llathen yn 0.9144 metr yn union ac, yn ei dro, diffiniwyd troedfedd yn 0.3048 metr (304.8 mm) yn union.
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Yn 1959, diffiniwyd gan y cytundeb llathau a phwysau rhyngwladol (rhwng yr Unol Daleithiau a gwledydd y Gymanwlad) bod llathen yn 0.9144 metr yn union ac, yn ei dro, diffiniwyd troedfedd yn 0.3048 metr (304.8 mm) yn union.
Uned o hyd yn y system fetrig yw'r cilometr, sy'n gyfwerth â mil metr.
Mae 1Km yn gyfwerth â 0.6214 milltir.1km
| -20.000ft | -0.0060960km |
| -19.000ft | -0.0057912km |
| -18.000ft | -0.0054864km |
| -17.000ft | -0.0051816km |
| -16.000ft | -0.0048768km |
| -15.000ft | -0.0045720km |
| -14.000ft | -0.0042672km |
| -13.000ft | -0.0039624km |
| -12.000ft | -0.0036576km |
| -11.000ft | -0.0033528km |
| -10.000ft | -0.0030480km |
| -9.0000ft | -0.0027432km |
| -8.0000ft | -0.0024384km |
| -7.0000ft | -0.0021336km |
| -6.0000ft | -0.0018288km |
| -5.0000ft | -0.0015240km |
| -4.0000ft | -0.0012192km |
| -3.0000ft | -0.00091440km |
| -2.0000ft | -0.00060960km |
| -1.0000ft | -0.00030480km |
| Troedfeddi | Cilometrau |
|---|---|
| 0.0000ft | 0.0000km |
| 1.0000ft | 0.00030480km |
| 2.0000ft | 0.00060960km |
| 3.0000ft | 0.00091440km |
| 4.0000ft | 0.0012192km |
| 5.0000ft | 0.0015240km |
| 6.0000ft | 0.0018288km |
| 7.0000ft | 0.0021336km |
| 8.0000ft | 0.0024384km |
| 9.0000ft | 0.0027432km |
| 10.000ft | 0.0030480km |
| 11.000ft | 0.0033528km |
| 12.000ft | 0.0036576km |
| 13.000ft | 0.0039624km |
| 14.000ft | 0.0042672km |
| 15.000ft | 0.0045720km |
| 16.000ft | 0.0048768km |
| 17.000ft | 0.0051816km |
| 18.000ft | 0.0054864km |
| 19.000ft | 0.0057912km |
| Troedfeddi | Cilometrau |
|---|---|
| 20.000ft | 0.0060960km |
| 21.000ft | 0.0064008km |
| 22.000ft | 0.0067056km |
| 23.000ft | 0.0070104km |
| 24.000ft | 0.0073152km |
| 25.000ft | 0.0076200km |
| 26.000ft | 0.0079248km |
| 27.000ft | 0.0082296km |
| 28.000ft | 0.0085344km |
| 29.000ft | 0.0088392km |
| 30.000ft | 0.0091440km |
| 31.000ft | 0.0094488km |
| 32.000ft | 0.0097536km |
| 33.000ft | 0.010058km |
| 34.000ft | 0.010363km |
| 35.000ft | 0.010668km |
| 36.000ft | 0.010973km |
| 37.000ft | 0.011278km |
| 38.000ft | 0.011582km |
| 39.000ft | 0.011887km |
| Troedfeddi | Cilometrau |
|---|---|
| 40.000ft | 0.012192km |
| 41.000ft | 0.012497km |
| 42.000ft | 0.012802km |
| 43.000ft | 0.013106km |
| 44.000ft | 0.013411km |
| 45.000ft | 0.013716km |
| 46.000ft | 0.014021km |
| 47.000ft | 0.014326km |
| 48.000ft | 0.014630km |
| 49.000ft | 0.014935km |
| 50.000ft | 0.015240km |
| 51.000ft | 0.015545km |
| 52.000ft | 0.015850km |
| 53.000ft | 0.016154km |
| 54.000ft | 0.016459km |
| 55.000ft | 0.016764km |
| 56.000ft | 0.017069km |
| 57.000ft | 0.017374km |
| 58.000ft | 0.017678km |
| 59.000ft | 0.017983km |
| 60.000ft | 0.018288km |
| 61.000ft | 0.018593km |
| 62.000ft | 0.018898km |
| 63.000ft | 0.019202km |
| 64.000ft | 0.019507km |
| 65.000ft | 0.019812km |
| 66.000ft | 0.020117km |
| 67.000ft | 0.020422km |
| 68.000ft | 0.020726km |
| 69.000ft | 0.021031km |
| 70.000ft | 0.021336km |
| 71.000ft | 0.021641km |
| 72.000ft | 0.021946km |
| 73.000ft | 0.022250km |
| 74.000ft | 0.022555km |
| 75.000ft | 0.022860km |
| 76.000ft | 0.023165km |
| 77.000ft | 0.023470km |
| 78.000ft | 0.023774km |
| 79.000ft | 0.024079km |