Finding the right curtain width for a 120 cm window isn't a matter of chance. The choice is based on a precise balance between proportions, finishes and visual effects. To achieve an aesthetic and functional result, it's important to take into account an often overlooked parameter: the fullness coefficient. This factor is used to calculate the ideal width of fabric, taking into account the desired style.
The higher the coefficient, the more pleated and generous the curtain. On the other hand, a moderate value gives a flowing, non-overloaded fall. For a standard 120 cm window, this means a fabric width of between 180 cm and 240 cm. This range guarantees both aesthetics and practicality, while allowing light to circulate or ensuring total concealment.
This rule of thumb forms the basis, but there are other factors at play, such as the type of fabric, the rod and the desired effect. All influence the curtain's final appearance and effectiveness.
What width for what type of finish and effect?
The choice of finish profoundly transforms the appearance of a curtain. Each type of hook requires a different calculation to achieve a consistent aesthetic.
A curtain with eyelets or single pleats requires a fullness factor of 1.5, giving a fluid, contemporary fall. This style is perfect for modern or minimalist interiors. It is equally suited to sheers and light blackout curtains.
On the other hand, for a curtain with deep pleats or pronounced gathers, double the width of the window. This creates a measured opulence, suitable for both classic and sophisticated settings. This type of finish requires a softer fabric, but also a sufficiently strong rod. Furthermore, this type of confection can be combined with an acoustic curtain to effectively attenuate noise pollution while maintaining an elegant aesthetic.
Here are some concrete examples for a 120 cm window:
Light, uncluttered effect: two 90 cm sections offer a total of 180 cm of fabric.
Generous coverage: two 120 cm sections ensure 240 cm width, for an enveloping fall.
Size changes everything, and this variation makes it possible to adjust the ambience of a room to its function. In an office, lightness is preferred. In a bedroom, complete concealment is paramount. For this, a blackout and insulating curtain guarantees optimal darkness and appreciable thermal comfort, whatever the season.
Practical tip: test the effect of the curtain with a sheet or light fabric.
Before placing your order, use a sheet or fabric of similar dimensions to simulate the effect in your room. Hang it temporarily on the rod: this will allow you to visualize the fullness, transparency and fall of the future curtain. This is a simple and effective way of avoiding mistakes and fine-tuning your preferences according to light, style or desired level of coverage - especially if you're looking for a balance between acoustic comfort and aesthetics in an office or bedroom.
How do you take the right measurements before choosing the width?
One wrong measurement is enough to throw the whole project off balance. Before buying or making, it's important to identify the right visual and technical reference points. The width of the rod, the desired overhang, the height of the support... all influence the final cut.
Always measure the rod, not just the window. The latter is not enough to define the actual surface to be covered. For a 120 cm opening, we recommend placing the rod 15 to 20 cm above the window. This accentuates the height of the room and visually lengthens the curtain.
An overhang of 15 to 30 cm on the sides allows the window to be completely unobstructed once the curtains are open. This calculation gives a rod length of around 150 cm (120 cm + 2 x 15 cm).
With this new measurement, the width of the curtain must be recalculated. By applying a coefficient of 1.5 to 2, we obtain a final width of 225 to 300 cm of fabric.
Comparative table of magnitude coefficients according to desired effect
| Sought-after style | Type of finish | Recommended amplitude coefficient | Width for 150 cm rod |
|---|---|---|---|
| Fluid, discreet fall | Eyelets or simple pleats | 1,5 | 225 cm |
| Light decorative effect | Soft sheer | 1,7 | 255 cm |
| Opulent atmosphere | Flemish pleats or gathers | 2 | 300 cm |
| Thermal and sound insulation | Blackout or soundproofing | 2 | 300 cm |
| Curtain without marked pleats | Stiff or heavy fabric | 1,5 à 1,7 | 225 to 255 cm |
This table summarizes the key correspondences between the visual style required and the quantity of fabric needed. It serves as a quick reference to avoid miscalculations, by adapting to different contexts of use.
The My Magic Curtain choice: performance, comfort and sustainability
My Magic Curtain 's expertise is based on a simple promise: to offer curtains that combine aesthetics, interior comfort and technical efficiency. Designed for urban workers, telecommuters, young parents and fans of responsible design, their products respond to real-life challenges.
For a 120 cm window, the brand offers optimized configurations: two 120 cm sections each, perfectly adapted to noise reduction, blackout and thermal insulation needs. Sound-absorbing models absorb up to 80% of noise pollution, ideal for creating a space for concentration or a peaceful bedroom.
Each curtain is made in France from sustainable, eco-friendly materials. The design is uncluttered, the finishes meticulous. From eyelets to Flemish pleats, everything can be customized to suit the desired ambiance. Customers have access to an intelligent configurator that guides them in their choice of dimensions and fullness ratio, to get the right measurements right from the first order.
This level of customization ensures a natural, crease-free fall, while promoting a commitment to the environment and local communities. My Magic Curtain doesn't just sell a curtain: the brand transforms every room into a place of well-being and energy efficiency.
The right measurement for a successful curtain project
A good curtain starts with precise measurements. For a 120 cm window, it's not enough to choose at random: you need to understand the coefficients, anticipate overhangs and adapt the fabric to the style and function of the room.
Between thermal comfort, acoustic insulation and decorative appeal, the right calculation becomes a tailor-made solution. Whether you're a teleworker, a parent or a decorating enthusiast, the right choice of width transforms your space. What kind of atmosphere would you like to create with your curtains?