Time/Temperature Conversion Chart

To use the chart below, find the recommended or normally used development time at 68F. Follow the column, left or right, until it matches the new temperature column. For example, if 8 minutes at 68F is recommended, the time at 75F will be 5.5. minutes.

Note: Development times below 5 minutes are not recommended due to the risk of uneven development.

64F

66F

68F

70F

72F

75F

77F

80F

5.0

4.5

4.0

3.5

3.25

2.5

*

*

5.5

5.0

4.5

4.0

3.75

3.0

*

*

6.0

5.5

5.0

4.5

4.0

3.25

*

*

6.5

6.0

5.5

5.0

4.5

3.5

*

*

7.25

6.5

6.0

5.5

5.0

4.0

3.75

*

8.0

7.25

6.5

6.0

5.25

4.5

4.0

3.5

8.75

7.75

7.0

6.5

5.75

5.0

4.5

3.75

9.25

8.25

7.5

6.75

6.0

5.25

4.75

4.0

9.75

8.75

8.0

7.25

6.5

5.5

5.0

4.25

10.5

9.5

8.5

7.75

7.0

6.0

5.5

4.75

11.25

10.0

9.0

8.0

7.25

6.25

5.75

5.0

11.75

10.5

9.5

8.5

7.75

6.5

6.0

5.25

12.5

11.25

10.0

9.0

8.0

7.0

6.25

5.5

13.0

11.75

10.5

9.5

8.5

7.25

6.5

5.75

13.75

12.25

11.0

10.0

9.0

7.5

6.75

6.0

14.25

12.75

11.5

10.5

9.25

8.0

7.25

6.25

14.75

13.25

12.0

10.75

9.75

8.25

7.5

6.5

15.25

13.75

12.5

11.25

10.0

8.75

8.0

7.0

16.0

14.5

13.0

11.75

10.5

9.0

8.25

7.0

16.75

15.0

13.5

12.0

11.0

9.25

8.5

7.25

17.25

15.5

14.0

12.5

11.25

9.75

9.0

7.75

17.75

16.0

14.5

13.0

11.75

10.0

9.0

7.75

18.5

16.75

15.0

13.5

12.25

10.5

9.5

8.0

19.25

17.25

15.5

14.0

12.75

10.75

9.75

8.25

19.75

17.75

16.0

14.5

13.0

11.0

10.0

8.5

20.5

18.5

16.5

14.75

13.5

11.5

10.25

8.75

21.0

19.0

17.0

15.25

13.75

11.75

10.5

9.0

21.75

19.5

17.5

15.75

14.25

12.0

10.75

9.25

22.25

20.0

18.0

16.25

14.5

12.5

11.25

9.75

22.75

20.5

18.5

16.75

15.0

12.75

11.5

9.75

23.5

21.0

19.0

17.25

15.5

13.25

12.0

10.25

24.25

21.75

19.5

17.5

16.0

13.5

12.25

10.5

24.75

22.25

20.0

18.0

16.25

13.75

12.5

10.75

25.25

22.75

20.5

18.5

16.75

14.25

12.75

11.0

26.0

23.5

21.0

19.0

17.0

14.5

13.0

11.25

26.5

23.75

21.5

19.5

17.5

15.0

13.5

11.5

27.25

24.5

22.0

19.75

17.75

15.25

13.75

11.75

27.75

25.0

22.5

20.25

18.25

15.5

14.0

12.0

28.25

25.5

23.0

20.75

18.75

16.0

14.5

12.5

28.75

26.0

23.5

21.0

19.0

16.25

14.75

12.75

29.75

26.75

24.0

21.75

19.5

16.75

15.0

13.0

30.25

27.25

24.5

22.0

19.75

17.0

15.25

13.0

30.75

27.75

25.0

22.5

20.25

17.25

15.5

13.25