As there was demand on the official DOFUS PC forums for a Profession Experience Calculator, I've gone ahead and created one: click here to take a look (and click File > Download as to download an editable copy).
When calculating DOFUS Touch profession experience...
Enter your Current level, Target level and Number of slots being crafted into the boxes with red outlines;
You will be told immediately whether or not you can use that craft to reach the Target level - "YES" will be shown if there are no violations (eg crafting a 7-slot item at level 40, which is not possible); "NO" will be shown if there are (and the reason given); and
You will then be told how many crafts are needed to reach the Target level, which is rounded up.
When calculating DOFUS PC profession experience...
Enter your Current level, Target level and Level of item being crafted into the boxes with red outlines;
You will be told immediately whether or not you can use that craft to reach the Target level - "YES" will be shown if there are no violations (eg crafting a level 10 item at level 170, which would yield 0 XP); "NO" will be shown if there are (and the reason given);
You will see the Average XP per craft, which takes into consideration level disparity (and the resultant reduced XP; see this official forum post for more information); and
You will then be told how many crafts are needed to reach the Target level, which is rounded up.
Let me know what you think/if you find any errors!