以下详细说明暂以英文提供。
What goes into the daily cost
The daily figure doubles your one-way distance, divides by efficiency to get fuel, multiplies by the pump price, then adds any parking and tolls you pay per day. That total rolls up to the week (× your commute days), the month (× 4.33, the average weeks in a month), and the year (× 52). Mixed units are fine — the calculator converts kilometers, L/100km, and per-liter prices internally so a metric car and a US pump still produce one honest number.
The hours column matters too
Enter your real door-to-door average speed, stops and traffic included, and the calculator shows the hours a year your commute takes — a 40-mile round trip at 30 mph is nearly 350 hours a year, six full waking weeks behind the wheel. Seeing cost and time together makes the trade-offs concrete: one carpool day a week cuts both by 20%, and transit or remote days reclaim hours that no fuel discount can.
中国本地参考
日常计算时值得知道的中国本地规则：
- 计量的单位习惯: 住房面积用平方米，土地常用亩（1 亩 ≈ 666.7 平方米）；里程用公里，油耗用 L/100km。
- 日期与数字格式: 日期写作 2026年10月13日（年-月-日）；大数习惯用万、亿（1 万 = 10,000，1 亿 = 100,000,000）。
- 法定节假日: 全年法定节假日 11 天，春节与国庆为长假；调休安排每年由国务院办公厅发布。
- 速度与限速: 高速公路最高限速 120 km/h，城市快速路多为 80 km/h，均以公里每小时计。
- 鞋服尺码: 鞋码用中国码（毫米制），服装常用 155/80A 这类身高围度组合，与欧美码不同。
数据核对：2026 年 10 月
常见问题
Why 4.33 weeks per month?
A year has 52 weeks but 12 months, so the fair monthly figure is 52 ÷ 12 ≈ 4.33. Multiplying a weekly cost by a flat 4 overstates nothing and understates the year — this keeps the three rows consistent.
Does this include depreciation and maintenance?
No — those vary too much by vehicle to assume. A practical add-on is 5–10 cents per mile for wear, tires, and servicing; at 10,000 commute miles a year that is another $500–1,000 on top of the fuel total.
What speed should I enter?
Your true average across the whole drive, gate to gate. Crawling through town at an effective 20 mph is common; the highway speed limit is the wrong number unless your drive really is all open road.