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Calendar Heatmap Maker

Draw one square per day, laid out in real calendar weeks and shaded by value. Upload a date and a number for each day and publish a calendar heatmap for free.

免费创建 Calendar Heatmap查看图库

什么是 Calendar Heatmap？

A calendar heatmap lays every day of the year out as a small square, arranged in weeks so each column is a week and each row is a weekday. Colour carries the value: a darker square is a busier day. It is the shape made familiar by contribution graphs, and it earns its place because it shows rhythm. Weekday against weekend, a seasonal swell, a streak of busy days or a long gap are all visible at a glance, where a line chart of the same numbers would flatten them into one wiggle. Days with no reading are drawn in a separate colour, so a missing day is never mistaken for a day with a value of zero.

什么时候使用 Calendar Heatmap

  • You have one number per day

    Commits, sales, steps, support tickets, rainfall. A single date and a single value per row is all the template needs.

  • You care about rhythm and streaks

    The weekly layout makes weekday patterns, busy seasons and unbroken runs of activity easy to spot.

  • You want a year at a glance

    Three hundred and sixty-five values fit in a compact strip, with one band for each year in your data.

  • Gaps are part of the story

    Days absent from your data are shown in a distinct no-data colour, separate from the low end of the scale.

什么时候不该用 Calendar Heatmap

  • You need exact values

    Colour is a rough encoding. If readers must compare precise numbers, use a bar or line chart, or a table.

  • Your data is monthly or yearly

    One square per day needs daily data. Coarser data is better shown as a column chart or a standard heatmap.

  • You need events on a calendar

    This chart colours days by a number. It does not list events or appointments.

  • You have only a few days

    A handful of days leaves the grid mostly empty. A small bar chart reads better.

如何制作 Calendar Heatmap

从电子表格到已发布的图表，一步一步来。

  1. 01Open the Calendar Heatmap template
  2. 02Add your dates and values
  3. 03Upload or connect your data
  4. 04Choose a colour theme
  5. 05Tune the cells, labels and legend
  6. 06Publish and embed
阅读完整的 Calendar Heatmap 指南

Calendar Heatmap 的组成部分

Day squares
One square per day, shaded by its value.
Week columns
Each column is a calendar week, so a row reads across the same weekday.
Month labels
Short month names along the top mark where each month begins.
Weekday labels
Mon, Wed and Fri are labelled, which is enough to orient the reader.
Year bands
Each year in your data gets its own band, stacked top to bottom.
Colour legend
Shows the no-data colour and the scale from the lowest to the highest value.

Calendar Heatmap 的常见错误

Treating a missing day as zero

Leave days out of the file if you have no reading. The no-data colour keeps them distinct from a real zero.

Letting one outlier set the scale

A single huge day flattens everything else to the palest shade. Set a custom maximum in the Scale tab.

Using an ambiguous date format

A date such as 03/04 can mean two things. ISO dates, such as 2024-04-03, are the safest.

Cramming too many years in

Each year adds a band. Many years make the squares small, so show the span that matters.

Calendar Heatmap：常见问题

Showing one value per day, such as activity or sales, so patterns across weekdays and seasons stand out.

立即制作你的 Calendar Heatmap

免费开始，300 多个模板，无需信用卡。

免费创建 Calendar Heatmap全部图表类型