You can use the Ruler/Protractor. As of Blender 2.80 the operator was renamed to Measure but it acts like the same way. Good news is that the Measure tool is now directly accessible from 3d View as part of the main Tool Shelf (T) and via ShiftSpacebarM hotkey.
Measure (Blender 2.80) vs Ruler/Protractor (Blender 2.79)
If you hold down Ctrl while dragging ...
Open the toolbar in the 3D Viewport using T. Navigate to the Grease Pencil section and click the 'Ruler/Protractor' button. You can now click and drag in the 3D Viewport to create a ruler and or protractor measurement.
If the section of the cut-off happens to be an isosceles triangle, you can simply use Bevel tool to "cut" precisely.
CtrlB to bevel selected edge;
Use Offset as bevel type, the amount is how much you want to cut off the edge.
If both lengths are different, you may consider manually translate or slide one of them after beveling.
Another way to do this ...
As well as the ruler and protractor option that was added in blender 2.67, you can also display edge length and angles while you are editing.
In 2.80+ you can find the length and angle options in the viewport overlay options menu.
For v2.7x, you can turn on these options under the Mesh Display panel of the properties region - N
Enable the '3D Print Toolbox' addon.
Open the '3D Printing' tab in 3D view > Tool shelf.
Under statistics, press the Area button. (there's also option for volume and other checks for geometry).
The Addons shelf has been moved on the right of the screen. Press N in the 3D Viewport or click the arrow in the top right of the area to expand it.
Simply tick Length under Mesh Display in the Properties side panel and it will show the length of the edges (also tick Area to show the area if there are any faces). These measurements will use the unit specified under Units in your Scene settings. The shown units are local units and are scaled to world units by the object's Scaling settings (see also Why ...
Pressing Delete will delete the active ruler (whichever is selected or left-click to select a specific one) before having pressed enter (all the options in the help line are options for during the creation of the ruler).
If you have already pressed Enter you can re-click the grease pencil 'Ruler/Protractor' button to re-enable the rulers and go through the ...
When performing any action (such grabbing) that has a number input during the modal operator; you must first press = or NumPad * to enable advanced input for the units.
By default the number input for the modal operators is set to simple, that is why typing in any units after the value does not work.
I would highly suggest everybody reads the release notes ...
MeasureIt addon also gives the total sum of values.
It's displayed under the measurements list.
Select all the edges you want to measure
Select a "measure group" like 'A' (or it won't work)
Click the Segment button to calculate
Well, while there might be scripts helping with that, there are at least workarounds:
you can rotate with numerical input, in this example hitting S,-30,RETURN. You can switch on Edge Info >> Face Angle to see what you are doing. And you can rotate around the 3D cursor so you can decide where your center of rotation is (.,, switches back).
An even newer ...
You can set units and scale in the Properties Panel
Newly added cube after scaling to .01m with Edge Info Length enabled:
There are also a few settings in 3D-Views Properties-Panel (N) these influence only the display:
How to model effectively using exact measurements?
How can I use imperial units when entering measurements?
You could also do a Difference Boolean Modifier. It's fairly straight forward and useful for creating things like holes though solid geometry (windows is one good example).
The great thing here is that it can be done with a few clicks without taking into accounting measuring sides, just position the two objects as you want them to be.
Cube and ...
You can't enter an angle directly to define your edge angle. What you can do though is measuring the angle between two edges with the ruler tool.
Just enable the tool in the toolbar (T) in the edit mode and add 2 measurement points: On the first vertex of the first edge and on the last vertex of the second edge by hitting (Ctrl)+(LMB) and dragging your ...
My favorite tool for measuring things is the measureit addon.
Once the addon is installed and enabled, simply enable Show in 3D view > Tool Shelf (T) > Measureit tab. Then select the vertices you want to measure and click Segment. You can edit and delete individual measurements in the Properties Region (N):
First activate the 3D-Print Toolbox addon: Edit->Preference->Add-ons and search 'print'.
Now you can find the toolbox in the sidebar panel (press n if it does not show)
Look in the 3D-print tab under statistics.
One obvious solution seems to be snapping.
Select the road, and put 3D cursor there (Object > Snap > Cursor to selected)
Add > Object > Plane and set it's size to 9,012 meters. Now we have a measure.
Enable snapping to Vertex > Closest.
Move the rail along X axis and snap it to one corner of the 'measure' plane.
It will be exactly 9m from ...
If you go to edit>properties>Addons and enable the 3d print toolbox add-on then click on the 3d-print tab on the right side of your viewport you can click volume to get a numerical value for the volume of the object. From there you can either get both volumes and do the math yourself or you can bool the 2 objects and use the 3d-print tools to get the ...
By default it uses blender units (BU), which are equivalent to meters. You can specify imperial or metric units in Properties > Scene > Units:
Blender units vs metric
How do blender units and meters, feet, or yards correlate?
What is a sensible scale to work with?
Mesh Align Plus (my addon) was designed to do this. Here's how you measure angles (via GIF, text steps below):
Select/Grab 2 points
Select/Grab another 2 points
Hit "Angle of Lines"
You can get to that panel in the 3D View > Tools Panel (T). Selection order is important (first selected is the "Start" of the line. Also, the points can be anything (mesh ...
Are you looking for the Dimensions in 3D view > Tool shelf (N)?
You can also change the units these values are represented in. By default they are displayed in "blender units" (BU), which are equal to meters. To do this, adjust the settings in Properties > Scene > Units:
I should also point out that the Scale of an object is not limited to 0-1. For example:...
3D print toolbox
In the 3D print toolbox add-on (it's already bundled with the official verion of Blender, you just have to enable it) there are two buttons (you can fin the right on the top of the tab), one for the volume and one for the surface (area)
Results are shown in the latest line of the panel once one of the two buttons is pressed.
The commands ...
There are a number of places that affect texture scale:
UV scale, see UV editing and the UV Warp modifier.
Texture space: Object | Transform | Scale Texture Space (Shift+Alt+T). For numeric input see the Texture Space panel under Object data tab of the Properties editor.
For BI this is found in the Mapping panel of the Texture ...
This is still a big problem in my world (CAD + BIM + CNC/CAM), and Included in this is a mix of metric & imperial.
So I have just learned to get practical about it.
For metric cases, its pretty easy, because default Blender units equate to meters.
AutoCAD for instance truly takes on a "None" unit, and if you model in inches or mm you just keep ...
You can just enter an amount when some operator is called.
First you'll have to set your units:
Then, if you choose Metric, you can press, for instance, E (Extrude), and then press, for instance 2, to extrude the selected vertices, and move then by 2 meters.
Here are the steps you can follow.
Hit ShiftA on the keyboard.
Hit T to activate the Tool panel.
Under the "Add Circle" Header, key in the radius of the circle you need.
Note Take care not to move the circle before you change it's radius the option would be unavailable if you moved the circle before hitting T